A flash memory device, includes a case (1) having a chamber and an opening (1120) at one end thereof. A memory module (2) is received in the chamber and has a plug (22) formed at one end thereof. A pole (3) has a first portion (30) received in the chamber to drive the plug of the memory module moving in or out of the opening, and a second portion (31) opposite to the first portion. A revolver mechanism (5) has a main body (51) which is rotatable, and a spindle (52) assembled to the main body and rotatablely coupled to the second portion to drive the pole moving along a linear direction.