A path switching structure comprising: a branch part from which a plurality of transfer paths along which a medium is transferred is branched; a medium branch apparatus having a diverter guiding the medium introduced to the branch part along any one of the plurality of transfer paths to another transfer path among the plurality of transfer paths; a rotational shaft on which the diverter is rotatably mounted; and a guide member having a first guide surface guiding the medium transferred along a first transfer path, a second guide surface guiding the medium transferred along a second transfer path and a bent portion formed to be bent between the first guide surface and the second guide surface, wherein the plurality of transfer paths include the first transfer path along which the medium is introduced to the branch part, the second transfer path in which the medium is introduced to the branch part or the medium is discharged from the branch part, and a third transfer path in which the medium is introduced to the branch part or the medium is discharged from the branch part, wherein the diverter includes a first surface disposed on the first transfer path and coming into contact with the medium transferred along the first transfer path so that a force is applied by the medium to the diverter and a second surface disposed on the third transfer path, wherein the diverter is rotated between a first position linking the second transfer path and the third transfer path and a second position linking the first transfer path and the second transfer path and is rotated from the first position to the second position by the force applied by the medium introduced to the branch part along the first transfer path, wherein in a state in which the diverter is mounted on the first guide surface spaced apart from the bent portion as an end portion of the diverter is mounted on the first guide surface, the second guide surface protrudes toward the second transfer path, relative to the diverter, and wherein when the diverter is placed in the first position, the bent portion protrudes toward the second transfer path, relative to the second surface for preventing the medium transferred from the second transfer path to the third transfer path from being caught by the diverter. a branch part from which a plurality of transfer paths along which a medium is transferred is branched; a medium branch apparatus having a diverter guiding the medium introduced to the branch part along any one of the plurality of transfer paths to another transfer path among the plurality of transfer paths; a rotational shaft on which the diverter is rotatably mounted; and a guide member having a first guide surface guiding the medium transferred along a first transfer path, a second guide surface guiding the medium transferred along a second transfer path and a bent portion formed to be bent between the first guide surface and the second guide surface, the plurality of transfer paths include the first transfer path along which the medium is introduced to the branch part, the second transfer path in which the medium is introduced to the branch part or the medium is discharged from the branch part, and a third transfer path in which the medium is introduced to the branch part or the medium is discharged from the branch part, wherein the diverter includes a first surface disposed on the first transfer path and coming into contact with the medium transferred along the first transfer path so that a force is applied by the medium to the diverter and a second surface disposed on the third transfer path, wherein the diverter is rotated between a first position linking the second transfer path and the third transfer path and a second position linking the first transfer path and the second transfer path and is rotated from the first position to the second position by the force applied by the medium introduced to the branch part along the first transfer path, wherein in a state in which the diverter is mounted on the first guide surface spaced apart from the bent portion as an end portion of the diverter is mounted on the first guide surface, the second guide surface protrudes toward the second transfer path, relative to the diverter, and wherein when the diverter is placed in the first position, the bent portion protrudes toward the second transfer path, relative to the second surface for preventing the medium transferred from the second transfer path to the third transfer path from being caught by the diverter.