Provided is a base for a dental work model, said base being capable of easily improving an error between a pin which is vertically mounted to a fixation plate and a part, into which the pin is to be inserted, of a supporting base. The base (1) for a dental work model comprising a fixation plate (10), on the upper surface of which a tooth model (2) is fixed, pins (20) which are vertically mounted to the lower surface of the fixation plate (10), and a supporting base (30) which is detachably connected to the fixation plate (10) via the pins (20), characterized in that: in a plane part (31) of the supporting base (30), said plane part serving as a connecting part to the fixation plate (10), through holes (32), into which the pins (20) are to be inserted respectively, are formed and, on the back side of the plane part (31), two or more holding parts (33), for each of the through holes (32), are vertically mounted from the peripheral edge of the through holes (32) so that the pins (20) are slidably held in the inner peripheral surface of the through holes.
