PROBLEM TO BE SOLVED: To provide a needless syringe which can easily achieve a desired injection depth relative to an injection target region of a living body or the like.SOLUTION: In a tip end part of an emitting part of a needless syringe, a partitioning wall part which protrudes outward so that a prescribed region including an emitting port is in contact with an injection target region in the use of the syringe and has a prescribed thickness and a nozzle part where a plurality of flow passages including the emitting port are formed in the partitioning wall part, and each of the plurality of the flow passages is configured that a pressurized objective injection substance flows in and that a passing distance of the objective injection substance along each of the flow passages is equal are provided in the nozzle part. Then, the tip end part is divided into the partitioning wall part where the plurality of the flow passages are formed and a holding member which is configured to hold the partitioning wall part on a body side of the emitting part and is constituted to be independent from the partitioning wall part.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2016,JPO&INPIT【課題】生体等の注射対象領域に対して所望の注射深さを容易に実現し得る無針注射器を提供する。【解決手段】無針注射器の射出部の先端部において、注射器の使用時において射出口を含む所定の領域が注射対象領域に対して接触状態となるように外部に突出し、且つ所定の厚さを有する隔壁部と、隔壁部において射出口を含む流路が複数形成されたノズル部であって、該複数の流路のそれぞれは、加圧された注射目的物質が流れ込み、且つ各流路に沿った該注射目的物質の通過距離が略等しくなるように形成されたノズル部と、が設けられる。そして、その先端部は、複数の流路が形成された上記隔壁部と、隔壁部を射出部の本体側に保持するための部材であって、該隔壁部とは独立して構成される保持部材とに分割構成される。【選択図】図6
