Trans-Europe Express (German: Trans Europa Express) is the sixth studio album by German electronic band Kraftwerk. Recorded in 1976 in Düsseldorf, Germany, the album was released in March 1977 on Kling Klang Records. It saw the group refine their melodic electronic style, with a focus on sequenced rhythms, minimalism, and occasionally manipulated vocals. The themes include celebrations of the eponymous European railway service and Europe as a whole, and meditations on the disparities between reality and appearance.

Trans-Europe Express charted at 119 on the American charts and was ranked number 30 in The Village Voice's 1977 Pazz & Jop critics' poll. Two singles were released: "Trans-Europe Express" and "Showroom Dummies". The album has been re-released in several formats and continues to receive acclaim as one of the best albums of the 1970s and of all time. In 2014, the Los Angeles Times called it "the most important pop album of the last 40 years".

After the release and tour for the album Radio-Activity, Kraftwerk continued to move further away from their earlier krautrock style of improvised instrumental music, refining their work more into the format of melodic electronic songs. During the tour for Radio-Activity, the band began to make performance rules such as not to be drunk on stage or at parties. Karl Bartos wrote about these rules, stating that "it's not easy to turn knobs on a synthesizer if you are drunk or full of drugs. ... We always tried to keep very aware of what we were doing while acting in public." During this tour, early melodies that would later evolve into the song "Showroom Dummies" were being performed.

In mid-1976, Kraftwerk began to work on the album which was then called Europe Endless. Paul Alessandrini suggested that Kraftwerk write a song about the Trans Europ Express to reflect their electronic music style. Ralf Hütter and Florian Schneider met with musicians David Bowie and Iggy Pop prior to the recording, which influenced song lyrics. Maxime Schmitt encouraged the group to record a French language version of the song "Showroom Dummies", which led the group to later record several songs in French. The album was recorded at Kling Klang Studio in Düsseldorf. Artistic control over the songs was strictly in the hands of members Hütter and Schneider, with Bartos and Wolfgang Flür contributing sequenced electronic percussion. Kraftwerk went to railway bridges to listen to the sounds the train would actually produce. The group found the sound the train made was not danceable and changed it slightly.

An important piece of new equipment used on the album was the Synthanorma Sequenzer, a customized 32-step 16-channel analog sequencer made for the band by Matten & Wiechers. This allowed the construction of more elaborate sequenced synthesizer lines, which are featured prominently in the tracks "Franz Schubert" and "Endless Endless", and liberated the player from the chore of playing repetitive keyboard patterns.

Whereas Radio-Activity had featured a mixture of German and English lyrics throughout the album, Trans-Europe Express went further and was mixed as two entirely separate versions, one sung in English, the other in German. At the recommendation of Maxime Schmitt, a French version of the song "Showroom Dummies", titled "Les Mannequins", was also recorded. "Les Mannequins" was the group's first song in French and would influence decisions to record songs in French on later albums. After recording the album in Düsseldorf, Hütter and Schneider visited Los Angeles to mix the tracks at the Record Plant Studio. Elements of the mixing sessions that were done in Los Angeles were dropped from the album, including the use of more upfront vocals in order to do more mixing in Düsseldorf and Hamburg later.

The artwork for the album cover of Trans-Europe Express was originally going to be a monochrome picture of the group reflected in a series of mirrors. This idea was dropped for a photo by New York-based celebrity photographer Maurice Seymour, with the group dressed in suits to resemble mannequins. J. Stara's image of the group was taken in Paris and is a highly retouched photo-montage of Kraftwerk from their shoulders up again posed as mannequins which are shown on the cover of the English version of the album. On the inside sleeve, a color collage of the group sitting at a small cafe table designed by Emil Schult was used. The photo for this scene was from the session by Maurice Seymour, taken on the group's American tour. Other photos were taken by Schult that show the group laughing and smiling. These were not used for the album's release.

Wolfgang Flür has stated Kraftwerk were influenced by the music of the Weimar Germany era: "we were children who were born straight after World War Two ... we had no musical or pop culture of our own ... there was the war, and before the war we had only the German folk music. In the 1920s or 1930s melodies were developed and these became culture that we worked from". Karl Bartos also spoke of post-war influence as the group thought that they "had this development in the 1920s which was very, very strong and was audio visual. We had the Bauhaus school before the war and then after the war we had tremendous people like Karlheinz Stockhausen and the development of the classical and the electronic classical. This was very strong and it all happened very close to Düsseldorf in Cologne and all the great composers at that time came there." Paul Alessandrini is credited for helping contribute to the album's concept. Alessandrini told Hütter and Schneider that "with the kind of music you do, which is kind of like an electronic blues, railway stations and trains are very important in your universe, you should do a song about the Trans Europe Express". Kraftwerk believed critics in the United Kingdom and the United States associated them with Nazi Germany, with tracks such as "Autobahn" inextricably linked with the Nazis who built the high-speed roads in the 1930s and 1940s. At the same time, the band were keen to move away from their German heritage towards a new sense of European identity and felt that the Trans-Europe Express could be used to symbolize this. AllMusic referred to Trans-Europe Express as a concept album with two different themes. The first being the disparities between reality and image, represented by the songs "Hall of Mirrors" and "Showroom Dummies", and the others about the glorification of Europe. Slant Magazine described the album as "a sonic poem to Europe".