A mobile apparatus includes a first body, a second body, a rotary adaptor including an accommodation portion to accommodate the second body, rotatably installed on the first body, and to move the second body to a position where the second body is stacked on the first body and a position where the second body is unfolded, first magnets disposed on the accommodation portion, and second magnets disposed on the second body so as to face the first magnets and having different polarity from the first magnets.