A chemical-liquid injection head 110 includes, a: a syringe holding unit 140 which holds a syringe in which a piston member is slidably inserted into a cylinder member having a circular cylindrical shape, b: a piston driving mechanism 130 having a ram member 131 for moving the piston member of the syringe, and c: a first light emitting portion 133a which emits light with a first color and illuminates the syringe and a second light emitting portion 133b which emits light with a second color and illuminates the syringe. The first light emitting portion 133a and the second light emitting portion 133b, viewed in a posture at the time of use of the injection head, are provided at an upper side of the ram member 131.
