PURPOSE: To simultaneously and simply execute the generation of a work model of a divided and reduced type and the installation to an occluder by a single work by providing a rim strain divided in accordance with a dentition of a dentition model, and providing a hole for inserting and supporting a dowel pin on each section.

CONSTITUTION: In a base for installing an occluder of a work model for dentistry, semiarc-like projecting rims 2a, 2b, 2c and 2d are formed and an outside peripheral rim train A, a center rim train B, and an inside peripheral rim train C of three trains are formed on the outside peripheral side of the upper face of a base 1. Each rim train A, B and C is divided by a section bank 3 so a to correspond to a dentition. In each section 4, a hole 6 for inserting and supporting a dowel pin 5 is formed by passing through to the back side. In this hole 6, axis center lines are formed in parallel to each other, and also, a sleeve is fitted and attached. This sleeve 7 is formed in a hollow cylindrical shape, and also, a tapered shape to match the dowel pin 5. By providing the sleeve 7 in advance on the holes 6 formed in parallel to each other, the dowel pin 5 is fitted straight into the base 1 without fail, and there is no unsteadiness nor interference of each tip.