This invention regards the medicine delivery device (10). The medicine delivery device (10) includes with the medicine container (18) which is arranged inside the front housing (12) and the rear housing (14) and the front housing (12) which are connected mutually. The container (18) had the delivery component, or it possesses the front open part for the delivery component, passes by here and the medicine is delivered. In addition as for the container, it possesses one movable stop section (25) at least. The length where the medicine delivery device (10) furthermore was decided beforehand and was compressed and the compressed spring (26) which possesses the major diameter which is decided beforehand is included. As for the length which was compressed, it is length of the spring when it is in a state where you can apply power beforehand. The device furthermore includes 1st guide expedient. As for 1st guide expedient, the front part (28) where it possesses the 1st length (61) which is decided beforehand and, the intermediate section (42) which possesses the 2nd length (62) which is decided beforehand and, it includes with the rear section (34) which possesses the 3rd length (63) which is decided beforehand. It is suitable to the length where the 3rd length which is decided beforehand was decided and was compressed the compressed spring beforehand, the front part (28) in order to contact with the movable stop section (25), is arranged, the intermediate section the annular ledge (41) and includes 1st lock - cancellation expedient (43), the rear section (34), when it is in a state where power you can apply the compressed spring beforehand, is surrounded completely by the compressed spring. The medicine delivery device (10) furthermore includes 2nd guide expedient. As for 2nd guide expedient, the 4th length (64) which is decided beforehand and with the rear end surface (31) and inside diameter and the 2nd lock - cancellation expedient which are decided beforehand the rear
