Provided is a syringe with which it is possible to hold with greater stability a liquid inside the barrel while maintaining the slidability and air-tightness between the barrel and the gasket without requiring fixation of silicone oil, and which is excellent in terms of accuracy of visual inspection. The syringe has a resin barrel, a gasket slidably inserted inside the barrel, a plunger attached to the gasket, and a silicone film obtained by applying silicone oil having a kinematic viscosity of 500 to 10,000 cSt over the inner peripheral surface of the barrel in an amount of 5 to 50 µg per 1 cm 2 of area.本發明係提供一種注射器，其無需進行矽酮油之固著化，仍可一方面確保注射筒與墊圈之滑動性及密封性，且可在注射筒內更穩定地收容液體，並且目視之檢查精度優良。本發明之注射器包括：樹脂製注射筒；滑動自如地插入於該注射筒內之墊圈；安裝於該墊圈之柱塞；及以面積每1cm2為5~50μg之塗布量將動黏度為500~100,000cSt之矽酮油塗布於前述注射筒之內周面上而成之矽酮膜。
