A stereotactic device of the present disclosure includes a base seat, a first moving module, a second moving module, a supporting module, and an operating module. The first moving module is disposed on the base seat and moves along a first direction, and the second moving module is disposed on the first moving module and moves along a second direction substantially perpendicular to the first direction. The supporting module is disposed on the second moving module and includes a supporting unit, and a grip unit that is disposed on the supporting unit. The operating module is disposed on the supporting module and includes a support unit, a rotating unit that is disposed on the support unit, a driving unit that is disposed on the support unit and that is co-movable with the rotating unit, and a sliding unit that is co-movable with the driving unit.
