Gentle Monster (Korean: 젠틀몬스터, stylized in all caps) is a South Korean brand of luxury sunglasses and eyeglasses founded in 2011. Gentle Monster is owned by parent company IICOMBINED, which also operates the fragrance brand Tamburins, dessert brand NUDAKE, headwear brand ATiiSSU, and tableware brand Nuflaat.

As of 2026, Gentle Monster operates 84 stores worldwide, and its products are available through over 450 retailers in 30 countries.

Gentle Monster's retail spaces incorporate large-scale installations, sculptures, and themed environments. Its parent company IICOMBINED launched the HAUS retail concept in 2021 with HAUS DOSAN in Seoul and HAUS SHANGHAI, followed by HAUS NOWHERE SHENZHEN in 2024.

In 2025, the company opened HAUS NOWHERE SEOUL, a mixed-use headquarters and retail complex in Seoul that houses Gentle Monster alongside Tamburins, ATiiSSU, NUDAKE, and Nuflaat.

Serial entrepreneur Jae Wook Oh invested about $100,000 in 2012 and Gentle Monster began producing frames in Daegu, which had been a manufacturing hub for Luxottica, and China, since acetate frames are illegal to produce in South Korea. The brand's designs favor oversized frames that are much larger than those by Western brands because its Asian clientele prefer frames that create the image of a smaller face.

In 2013 and 2014, Korean actress Jun Ji-hyun wore Gentle Monster lenses on My Love From the Star, which increased the brand's exposure to a mainstream audience.

In February 2016, the company's first US store opened on Grand Street in SoHo, New York City. Its second US store opened in downtown Los Angeles in October 2017. French luxury goods conglomerate LVMH invested $60 million for a 7% stake in the company in September 2017.

In 2025, Google was reported to have agreed to invest approximately $100 million for a 4% stake in Gentle Monster as part of its partnership with the company to develop Android XR smart glasses, which were expected to launch in 2026.