is removably connected via a screw the length of the casing 2 is sufficiently longer than the solid wax bar 1 so that a new wax bar can be supplied from the rear when the wax 1 is melted and shortened regarding replenishment of wax an air exhaust aperture 19 is provided close to the front end of the casing 2 when the plunger 13 advances beyond the air exhaust aperture 19 the air supplied from the inlet member 12 is discharged externally through the air exhaust aperture 19 an exhaustion sound generated at this time notifies the operator that the wax in the casing 2 has been consumed so that a new wax bar can be properly replenished the operation procedure and functions of the first embodiment are described below first supply the bar shaped solid wax for dental use in the casing 2 hold and move the casing 2 forward while sliding it along the internal surface of the sleeve 3 and connect it to the screw 4 of the connection member 5 activate the means for supplying air using the switch 15 to supply air in the casing 2 through the air inlet member 12 thus the plunger 13 is pushed and the front end of the wax 1 contacts the heating plate 70 in the connection member 5 simultaneously the ceramic heater 8 is powered using an external switch and heated to heat the nozzle member 7 which passes through the inside of the heater 8 the inside of the connection member 5 should be heated up to 100 u00b0 120 u00b0 c for example so that the wax 1 in the connection member 5 can be melted sufficiently the heat from the heated nozzle member 7.