PROBLEM TO BE SOLVED: To provide an applicator having a compact and simple structure, having extremely excellent operability, and improved in accuracy or workability of application.SOLUTION: An applicator includes: a syringe 11 filled with a liquid medicine； a liquid medicine spout part 12 which is provided in one end of the syringe 11, and with which a liquid medicine flow passage 19 communicates； a plunger 13 slidably inserted from the another end of the syringe 11； a press part 13A provided in an end part on the side of the plunger 13 opposite to the insertion side of the syringe 11, and making the liquid medicine inside the syringe 11 spout from the liquid medicine spout part 12 by a pressing force； a support part 14 supporting the syringe 11； a gas flow passage 17 formed in the support part 14, and used for supplying compressed gas to the liquid medicine spout part 12； and an operation part 16 attached to the support part 14, and starting the supply of the compressed gas to the liquid medicine spout part 12. The press part 13A is located in a position allowing the pressing by a thumb of a hand in which the operation part 16 is locked by at least one finger except the thumb.【課題】 小形で簡便な構造で、操作性に極めて優れ、塗布の正確さや作業性を向上させた塗布器具を提供する。【解決手段】 液剤が充填されるシリンジ１１と、シリンジ１１の一端に設けられ、液剤流路１９が連通する液剤噴出部１２と、シリンジ１１の他端からスライド可能に挿入される押し子１３と、押し子１３のシリンジ１１の挿入側と反対側の端部に設けられ、押圧によりシリンジ１１内の液剤を液剤噴出部１２から噴出させる押圧部１３Ａと、シリンジ１１を支持する支持部１４と、支持部１４に形成され、圧縮気体を液剤噴出部１２に供給する気体流路１７と、支持部１４に取り付けられ、圧縮気体の前記液剤噴出部１２への供給を起動させる操作部１６と、を有し、押圧部１３Ａは、親指以外の少なくとも一つの指で操作部１６を係止した手の前記親指で押圧できる位置にある。【選択図】図１
