To obtain a hand tool apparatus enabling attachment of a dust collector utilizing negative pressure to even many different kinds of drill apparatuses with out impairing visibility and operation property.

For a hand tool apparatus of especially a drill apparatus and/or a chisel apparatus, a dust collector 3 fixed to an apparatus housing so that dust sealing 4 at least partially encloses around a free end of a tool 2. The dust collector can freely moved by spring loading axially without being bent. In the hand tool apparatus 1 wherein a suction duct 6 by being guided parallel to the axial line by taking a distance radially to a tool axial line A, the dust collector 3 having the suction duct 6 is freely detachably fixed to a depth stopper 9 capable of being freely movable and being fixed to the apparatus housing along the tool axial line A by a guiding and fixing means 7. A clamping means 8 is provided to the guiding and fixing means 7, and the depth stopper 9 is preferably fixed to the apparatus housing of the hand tool apparatus by a clamping block 10.