A disassembly-proof atomizer (200) and an electronic cigarette. The disassembly-proof atomizer (200) comprises a protective sleeve (201), a mouthpiece cover (202) fixed at a first end of the protective sleeve (201), and a battery rod connecting element (203) arranged at a second end of the protective sleeve (201). Arranged within the protective sleeve (201) are a ventilation pipe (204), an electric heating wire component (205), and a piece of oil-storage cotton (206) covered on the exteriors of the ventilation pipe (204) and of the electric heating wire component (205). The battery rod connecting element (203) protects a protective cover connecting part (203a) and a battery rod connecting part (203b) that are connected to each other. Also, the battery rod connecting element (203) is provided with a center hole (203c) extending along the radial direction of the protective cover (201). A groove (203f) is provided at where the protective cover connecting part (203a) and the battery rod connecting part (203b) are adjacent to each other. The atomizer (200) plays a disassembly-proof effect and allows for effective prevention of addition of a substandard fuming oil into the atomizer of a single-use electronic cigarette, thus preventing reuse. ( Fig. 5 )
