An object of the present invention is to provide an automatic injection device that allows setting of conditions of puncture according to the thickness of a syringe needle, the puncture depth, and so forth to reduce pain in the puncture and reduce the impact in the puncture to allow alleviation of anxiety and fear of a patient. An automatic injection device of the present invention has a syringe holder that holds a syringe attachably and detachably, a first drive unit that causes the syringe holder holding the syringe to advance to perform puncture by a syringe needle, and a control unit that controls the first drive unit to control the puncture speed.
