Abstract: In a fixture for a data access device having a hole, the fixture includes a fixing base, a switch and an elastic member, and the fixing base includes a bottom plate, a pair of bent boards extended out from the bottom plate, and a through groove disposed on bottom plate and corresponding to the hole, a switch disposed on a side of the bottom plate and pivotally coupled to the bent board, and a positioning pillar corresponding to the through groove and protruded from a side of the switch that faces the bottom plate, and the elastic member is elastically clamped between the bottom plate and the switch, such that if the switch is pressed, the positioning pillar will be passed into or retracted from the hole, so as to simply the fixation and installation of the data access device.