Provided is a syringe with a needle in which the inclination of the needle is suppressed as much as possible by preventing the inclination of the core pin during insert molding. A syringe with a needle (10) includes a cylindrical body (14), a tube tip (13) provided at the distal end of the body (14), and an opening provided at the proximal end of the body (14). An outer cylinder (12) having a portion (16) and formed of a resin； and an injection needle (11) held by the cylinder tip (13), the shaft of the injection needle (11) and the body A syringe with a needle (10) in which the injection needle (11) and the outer cylinder (12) are integrally formed so that the axis of the portion (14) is substantially parallel to the barrel (14) ) Has a thick part (14b) and a thin part (14a) at a base end part of the trunk part (14) and opposed to each other across the axis of the trunk part (14). In the base end portion of the portion (14), the axis of the inner peripheral surface of the barrel portion is eccentric with respect to the axis of the outer peripheral surface of the barrel portion (14).インサート成型をする際にコアピンの傾きを防止することで、針の傾きを極力抑えた針付きシリンジを提供する。 針付きシリンジ（１０）は、筒状の胴部（１４）、前記胴部（１４）の先端に設けられた筒先部（１３）、及び前記胴部（１４）の基端に設けられた開口部（１６）を有し、樹脂で成形された外筒（１２）と、前記筒先部（１３）に保持された注射針（１１）とを備え、前記注射針（１１）の軸と前記胴部（１４）の軸とが略平行となるように前記注射針（１１）と前記外筒（１２）とが一体に成形されている針付きシリンジ（１０）であって、前記胴部（１４）は、前記胴部（１４）の基端部で、前記胴部（１４）の軸を挟んで対向した位置に、肉厚部（１４ｂ）と肉薄部（１４ａ）とを有し、前記胴部（１４）の基端部において、前記胴部（１４）の外周面の軸に対して前記胴部の内周面の軸が偏心しているものである。
