A medicament injection apparatus that permits injection of a fluid medicament into a patient through a needle. The medicament injection apparatus includes a timer and a display, the timer being actuated upon commencement of an injection operation, in which the timer runs to a predetermined time until completion of the injection operation and the display is operated while the timer runs. Thus, informing a user of when a required period for dispersal of an injected medicament has lapsed so that the user knows when to withdraw a needle from the body after the injection.