[Problem] To provide a hemostatic agent injection device which is so configured that an ejection part in a second member through which a hemostatic agent is ejected can be positioned properly at a puncture site on a blood vessel. [Solution] The hemostatic agent injection device 10 is provided with a first member 100 which has a tip-end opening 101, a base-end opening 103 and a rumen 105 that can communicate the tip-end opening with the base-end opening and a second member 200 which is connected to the first member and has, arranged at a tip part thereof, an ejection part 201a through which a hemostatic agent 240 can be ejected, in which the first member has a first region 101A that is located on the tip end side relative to the tip of the second member, the first region has a tilted part 101a that is tilted toward a direction away from the second member, and the tilted part forms the tip-end opening of the first member.
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