Abstract
A substrate transfer apparatus according to one or more embodiments may include substrate transfer apparatus including: an end effector including: a hand that grips a substrate; and a plunger that comes into contact with the substrate and performs alignment of the substrate comprising a contact portion that comes into contact with the substrate by moving in a substrate direction. A contact portion of the substrate transfer apparatus according to one or more embodiments includes a contact bottom surface that comes into contact with the substrate and is inclined so that a thickness decreases toward a tip of the contact portion.