A paper feeding apparatus of an image forming apparatus is provided. The paper feeding apparatus includes a pickup unit configured to rotate about a first axis, a swing member configured to rotate about a second axis, and to move the pickup unit from a contact location to a separation location by pressing the pickup unit, an elastic member configured to provide an elastic force to the swing member, and a rotation limiter configured to limit a rotation angle at which the swing member rotates, wherein a momentum of the swing member is less than a momentum of the pickup unit, while the swing member presses the pickup unit and rotates.