PROBLEM TO BE SOLVED: To provide a more appropriate injection needle unit for being indwelled in the biological body and continuously supplying medicinal solution, and a liquid injection apparatus.SOLUTION: An injection needle unit comprises: (1) a plurality of injection needles 110 injecting liquid into the biological body (2) a plate-like member 120 holding base end portions of the plurality of injection needles 110 and having a liquid-supplying groove portion 121 being a recessed groove 121 formed from an edge of the plate-like member 120 to the inside, the liquid-supplying groove portion 121 for inserting a supply tube 220 supplying a liquid from an outside and needle groove portions 122 being recessed grooves 122 being formed at positions spaced apart from the liquid-supplying groove portion 121, communicating with the plurality of injection needles 110 and distributing the liquid on a surface of the opposite side to tip sides of the injection needles 110 and (3) a lid member being attached to the surface of the opposite side to the tip sides of the injection needles 110 and having at least a recessed portion formed in a region facing a portion among the liquid-supplying groove portion 121 and the needle groove portions 122.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2017,JPO&INPIT【課題】生体に留置して継続的に薬液を供給するために、より好適な注入針ユニット及び液体注入装置を提供する。【解決手段】(1)生体に液体を注入する複数の注入針110と、(2)複数の注入針110の基端部を保持する板状部材120であって、注入針110の先端側とは反対側の面に、板状部材120の縁から内側に形成された凹状の溝122であって、外部から液体を供給する供給管220を挿入するための供給用溝部121と、供給用溝部121から離れた位置に形成された凹状の溝122であって、複数の注入針110に連通して液体を分配する針用溝部122とを有する板状部材と、(3)注入針110の先端側とは反対側の面に取り付けられる蓋部材であって、少なくとも供給用溝部121と針用溝部122との間の部位に対向する領域に形成された凹部を有する蓋部材と、を備える。【選択図】図6
