An injection pen, comprising an injection pen cover (1) and an injection pen body； the injection pen cover (1) is provided thereon with a display window (111), and the injection pen cover (1) is internally provided with a pushing member (2), a rotating member (3) and an elastic member (4)； the pushing member (2) is slidably disposed inside of the injection pen cover (1), and the rotating member (3) abuts against the pushing member (2)； the rotating member (3) is provided thereon with a prompt mark used for displaying at the display window (111), the prompt mark reminding a patient to carry out daily injection and preventing repeated injection, while also prompting a body position for a next injection using the injection pen； an end of the elastic member (4) abuts against the rotating member (3), while the other end abuts against a top end of the injection pen cover (1)； when the injection pen body extends into or projects out from the injection pen cover (1), the injection pen body is configured to push the pushing member (2) so as to drive the rotating member (3) to move, rotate and compress the elastic member (4)； when the injection pen body projects out from the injection pen cover (1), the elastic member (4) is configured to drive the rotating member (3) and the pushing member (2) to move in opposite directions so that the rotating member (3) rotates.La présente invention concerne un stylo d'injection, comprenant un élément de couverture de stylo d'injection (1) et un corps de stylo d'injection ； une fenêtre d'affichage (111) est disposée sur l'élément de couverture de stylo d'injection (1), et l'élément de couverture de stylo d'injection (1) est intérieurement pourvu d'un élément de poussée (2), d'un élément rotatif (3) et d'un élément élastique (4) ； l'élément de poussée (2) est disposé de façon coulissante à l'intérieur de l'élément de couverture de stylo d'injection (1), et l'élément rotatif (3) vient en butée contre l'élément de poussée (2) ； sur l'élément
