PROBLEM TO BE SOLVED: To provide an injector capable of avoiding such an event that a nozzle body is fitted in a guide tube to make it impossible to push an injection tube out of the guide tube.SOLUTION: An injector 1 for injecting a fertilized egg and sperm for artificial insemination into the uterus, includes: a guide tube 2 to be inserted into the uterus； an injection tube 3 passed into the guide tube 2； and a nozzle body 4 connected to the distal end of the injection tube 3. The nozzle body 4 includes a cylindrical connection part 41 to be connected to the injection tube 3, a trunk part 42 in which a nozzle hole 44 is opened at an outer peripheral surface, and a head part 43 concatenated to the trunk part 42 via a step part 45 that has an outside diameter larger than the inside diameter of the guide tube 2. The outer peripheral surface of the head part 43 has a plurality of recesses 46, at circumferential parts, extending from the step part 45 toward the distal end side in a grooved manner.SELECTED DRAWING: Figure 4
