An electronic cigarette is provided, which includes a connection structure between a battery assembly and an atomizer assembly. In the connection structure, a first connection member and a second connection member are connected. The second connection member defines a joint slot for receiving the first connection member. An elastic member includes a bulge radially protruding inward from an inner wall of the joint slot, or radially protruding outward from the first connection member. A buckle slot matched with the bulge is defined in an inner side of the second connection member or is defined in the outer side of the first connection member. The first connection member is inserted in the joint slot and is rotated to press and deform the bulge. When the bulge is rotated to enter the buckle slot, the bulge impacts an inner wall of the buckle slot to generate an indicating sound.