PURPOSE: To replace the decoration of a lower pad plate to match with the design of a front frame and the like.

CONSTITUTION: Fitting bosses 5a protruded on the rear face of a decorative plate member 5 are inserted into the fitting holes 4a bored on a lower pad plate 4, screws 6 are screwed from the rear face, and the decorative plate member 5 is removably and replaceably provided on the surface of the lower pad plate 4. The decorative plate member 5 can be easily changed in response to the design of a front frame 10 or the like, and the total design seen from the front of a pachinko game machine 1 can be improved.