An electronic device including an accessory, the electronic device comprising: a first electronic device having a first curved face on at least one side face and including at least one first magnet in the first curved face; a second electronic device having a second curved face on at least one side face and including at least one second magnet in the second curved face; an accessory structure including third and fourth curved faces (231, 232) facing the first and second curved faces (214, 223), and including at least one third magnet and at least one fourth magnet in the third curved face and the fourth curved face, respectively, characterized in that the accessory structure comprises a first cover part locatable on a portion of a front face of the first electronic device and including the third curved face formed on one side thereof to face the first curved face of the first electronic device, the fourth curved face formed on another side thereof to face the second curved face of the second electronic device, and a second cover part locatable on a rear face of the first electronic device, rotatably connected to the first cover part and capable of being bent while being rotated to face at least a portion of a rear face of the first electronic device configured for allowing the first electronic device to be mounted at various distinct mounting angles when the at least one first magnet of the first electronic device and the at least one second magnet of the second electronic device are attached to/detached from the at least one third magnet and the at least one fourth magnet of the accessory structure by magnetic force and the first and second curved faces (214, 223) of the first and second electronic devices (210, 220) are rotated along the third and fourth curved faces (231, 232) of the accessory structure such that the accessory structure is bent by the rotation of the first and second electronic devices (210, 220); and the first, second, third and fourth curved faces (214, 223, 231, 232) are convex. a first electronic device having a first curved face on at least one side face and including at least one first magnet in the first curved face; a second electronic device having a second curved face on at least one side face and including at least one second magnet in the second curved face; an accessory structure including third and fourth curved faces (231, 232) facing the first and second curved faces (214, 223), and including at least one third magnet and at least one fourth magnet in the third curved face and the fourth curved face, respectively, characterized in that the accessory structure comprises a first cover part locatable on a portion of a front face of the first electronic device and including the third curved face formed on one side thereof to face the first curved face of the first electronic device, the fourth curved face formed on another side thereof to face the second curved face of the second electronic device, and a second cover part locatable on a rear face of the first electronic device, rotatably connected to the first cover part and capable of being bent while being rotated to face at least a portion of a rear face of the first electronic device configured for allowing the first electronic device to be mounted at various distinct mounting angles when the at least one first magnet of the first electronic device and the at least one second magnet of the second electronic device are attached to/detached from the at least one third magnet and the at least one fourth magnet of the accessory structure by magnetic force and the first and second curved faces (214, 223) of the first and second electronic devices (210, 220) are rotated along the third and fourth curved faces (231, 232) of the accessory structure such that the accessory structure is bent by the rotation of the first and second electronic devices (210, 220); and the first, second, third and fourth curved faces (214, 223, 231, 232) are convex.