PROBLEM TO BE SOLVED: To provide a chemical self-injector having an improved structure, which enables a medical worker or the like to grasp the condition of a patient or to do other treatment by correctly checking the frequency of chemical injection operation which the patient performs.SOLUTION: The chemical self-injector includes a flexible reservoir 28 which is provided with a chemical injection port 38 and a chemical ejection port 40 and reserves a prescribed amount of chemical inside, and a pressing means 16 which presses the reservoir 28 to be deformed, by an operation from outside, so that the chemical reserved in the reservoir 28 may be ejected from the chemical ejection port 40. The self-injector includes counting means 82, 88, 94, 96, 98, 114 and 116 which count the frequency of ejection of the chemical from the reservoir 28 by pressing the pressing means 16.COPYRIGHT: (C)2012,JPO&INPIT【課題】医療従事者等が、患者が行った薬液注入操作の回数を正確に確認することで、患者の容態の把握等を実現し得る、改良された構造の薬液自己注入装置を提供すること。【解決手段】薬液注入口38と薬液注出口40とが設けられて内部に所定量の薬液を貯留する可撓性のリザーバ28と、外部からの操作でリザーバ28を押圧変形させてリザーバ28に貯留された薬液を薬液注出口40から注出させる押圧手段16とを、備えた薬液自己注入装置において、押圧手段16を押圧してリザーバ28から薬液を注出させた回数を数えるカウント手段82,88,94,96,98,114,116を設けた。【選択図】図1