To provide a syringe A which enables the impression material B loaded in the syringe main body 1 able to be watched from the outside and does not generate cracks even when boiled in a conditioner pot 4, and whose nozzle part 2 does not jump out by pressure when the impression material is pushed out by pushing in a piston 3.

The syringe main body 1 is formed of TeflonTM into transparent or semitransparent. A male screw (a) formed on the outer periphery face of a screw cylinder part 11 in the front end side of the syringe main body 1 is formed into corresponding dimensions of a shape so that the screw threads 6... with an almost trapezoidal shape or projected bar row shape forming bottoms 61... with width almost matching the width of the top face 60 between a thread 6 and another thread 60. A female screw (b) formed on the inner periphery of a screw cylinder part 21 on the rear end side of the nozzle part is formed into dimensions of a shape to be able to be screwed to the male screw (a) formed on the front end side of the syringe main body 1.