Injection head and chemical injection device comprising same

An injection head comprising:

• a:
• a syringe holding unit 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 having a ram member for moving the piston member of the syringe;
• and
• c:
• a first light emitting portion which emits light with a first color and illuminates the syringe, and a second light emitting portion which emits light with a second color and illuminates the syringe, wherein
• the first light emitting portion and the second light emitting portion, viewed in a posture at the time of use of the injection head, are provided at an upper side of the ram member,
• wherein the first light emitting portion and the second light emitting portion are arranged on a front-end surface of the injection head,
• the syringe holding unit is located further forward than the front-end face of the injection head and
• a direction of irradiation of lights from the first light emitting portion and the second light emitting portion is parallel to the central axis of the syringe.