In order that, even if a high back pressure is generated in the upper layer of skin, a needle does not come out of the skin and a medicine is prevented from leaking out of the skin, a medicine administration device (1) comprises: a tube body (2) which is provided with a liquid chamber (7) capable of containing a medicine and also with a discharge section (22)； a pusher member (3) which moves within the tube body (2)； a grip section (4)； and a connection section (5). The pusher member (3) is provided with a bar-like plunger (31) and a gasket (32). The grip section (4) is provided along the outer periphery of the tube body (2) so as to be spaced from the tube body (2). The connection section (5) is formed between the tube body (2) and the grip section (4).
