The present disclosure provides an electronic cigarette having an invertible mouthpiece. The electronic cigarette includes a battery assembly (1) and an atomization assembly (2), the battery assembly including a battery and a housing, and the atomization assembly including a mouthpiece (21), an outer sleeve (22) and a cartridge (3). The atomization assembly and the battery assembly are in pluggable connection. The housing defines a groove (13) in the upper part thereof. The outer sleeve has a tail end accommodated into the groove in a working state. The atomization assembly is inverted and the mouthpiece is accommodated into the groove in a receiving state. After the electronic cigarette is used, the mouthpiece can be inverted conveniently and can be completely hidden in the housing to be protected against contamination.
