A battery compartment for electronic cigarette comprising: support 20 defining mounting hole 21, locating holes 22, first through holes 23 on lateral sides and switch button 61 accommodated in the support and facing the mounting hole； an elastic element 70 (preferably spring or silicone gasket) abutting the button, passing through the mounting hole and abutting the switch button； a rotatable button 40 covering the support with a connector assembly 41 with second through holes 410 and configured to be inserted into locating hole, with a shaft 80 passing through first and second holes. Preferably, button comprises support block 43 accommodated in insert groove 24. A battery compartment comprising: support； housing sleeved on the support； PCB in the support； button covering the housing and with revolving shaft and connector clips； the support comprising connecting piece for shaft； and the connecting clip configured to pass through support to PCB.
