A myoelectric prosthesis, which can be used as a replacement for a person's upper limb, is able to control many hand motions optionally via surface electromyography (sEMG). Although many researchers have developed myoelectric prostheses that realize various motions, evaluation of their practicality has only been carried out on small numbers of patients. To solve this problem, a myoelectric prosthesis simulator that is able to move like a real prosthesis is needed. In this study, such a simulator that enables persons to grasp virtual objects with virtual prostheses was developed using Augmented Reality (AR). The results of comparative experiments conducted to evaluate the developed system using a pick and place task show that although it is not at present as effective as real prostheses, a virtual prosthesis is able to grasp virtual objects in the proposed simulator.