The Embraer E-Jet family is a series of four-abreast, narrow-body, short- to medium-range, twin-engined jet airliners designed and produced by Brazilian aerospace manufacturer Embraer.

The E-Jet was designed to complement Embraer’s earlier ERJ family, the company’s first jet-powered regional aircraft. With a capacity of 66 to 124 passengers, the E-Jets were significantly larger than any aircraft Embraer had developed before that time. The project was unveiled in early 1997 and formally introduced at the 1999 Paris Air Show. On 19 February 2002, the first E-Jet prototype completed its maiden flight, and production began later that year.

The first E170 was delivered to LOT Polish Airlines on 17 March 2004. Initial rollout issues were quickly overcome, and Embraer rapidly expanded product support for better global coverage. Larger variants, the E190 and E195, entered service later in 2004, while a stretched version of the E170, the E175, was introduced in mid-2005.

The E-Jet series achieved commercial success, primarily due to their ability to serve lower-demand routes while offering many of the amenities and features of larger jets. The E-Jet family is used by both mainline and regional airlines worldwide, with particular popularity among regional airlines in the United States. It also served as the foundation for the Lineage 1000 business jet.

In the 2010s, Embraer introduced the second-generation E-Jet E2 family, featuring more fuel-efficient engines. However, as of 2023, the first-generation E175 remains in production to meet the needs of U.S. regional airlines, which are restricted from operating the newer generation due to scope clause limitations.

During the 1990s, the Brazilian aerospace manufacturer Embraer had introduced the ERJ family, its first jet-powered regional jet. As demand for the ERJ series proved strong even early on, the company decided that it could not rely on one family of aircraft alone and examined its options for producing a complementary regional jet, including designs that would be larger and more advanced than its preceding aircraft.

During March 1997, Embraer made its first public disclosure that it was studying a new 70-seat aircraft, which was initially referred to as the EMB 170; this reveal was issued concurrently with the announcement of the development of the ERJ 135. As originally conceived, the EMB 170 was to feature a new wing and larger-diameter fuselage mated to the nose and cockpit of the ERJ 145. The proposed derivative would have cost $450 million to develop. While Alenia, Aerospatiale and British Aerospace through AI(R) were studying the Airjet 70 based on the ATR 42/72 fuselage for a 2,200 km (1,200 nmi; 1,400 mi) range, AI(R) and Embraer were studying a joint development of a 70-seater jet since their separate projects were not yet launched.

In February 1999, Embraer announced it had abandoned the derivative approach in favour of an all-new design. On 14 June 1999, the E-Jet family was formally launched at the Paris Air Show, initially using the twin designations ERJ-170 and ERJ-190; these were subsequently changed to Embraer 170 and Embraer 190 respectively. The launch customers for the airliner were the French airline Régional, which placed ten orders and five options for the E170, and the Swiss airline Crossair, which had ordered 30 E170s and 30 E190s.