A multi-speed transmission comprising: a driving shaft rotated as a rotational force is input; a plurality of driving gears (310, 340)) coupled to the driving shaft and rotated by a rotation of the driving shaft; a plurality of transmission gears (320, 330) engaged with the driving gears (310, 340); a transmission shaft including a plurality of pawls (600, 610, 620) protruding and retracting from an outer peripheral surface, coupled to the transmission gears (320, 330), and selectively coupled to at least some of the transmission gears (320, 330) according to the protruding/retracting of the pawls; a gear shifting control part configured to selectively control the protruding/retracting of the pawls (600, 610, 620 a plurality of driven gears (310, 340) engaged with at least some of the transmission gears (320, 330); and a driven shaft coupled to the plurality of driven gears (310, 340) and configured to transmit a rotation force to an object to be driven, characterized in that the gear shifting control part comprises: a plurality of guide members (400, 401, 402, 403, 404, 405) arranged in a hollow part of the transmission shaft, moved in a lengthwise direction of the transmission shaft, and accordingly coming into selective contact with the plurality of pawls (600, 610, 620), and configured to guide the protruding/retracting of the plurality of pawls (600, 610, 620); a plurality of guide rods (410, 411, 412, 413, 414, 415) of which one sides are each connected to one of the plurality of guide members (400, 401, 402, 403, 404, 405); a wire for gear shifting; and a gear shifting channel rotated by the wire and comprising a gear shifting guide groove (510, 530) formed to have a predetermined radius and a predetermined length, and wherein the plurality of guide rods (410, 411, 412, 413, 414, 415) have the other sides in contact with the gear shifting channel, are selectively inserted into the gear shifting guide grooves (510, 530) as the gear shifting channel is rotated, and thus selectively move the guide members (400, 401, 402, 403, 404, 405). a driving shaft rotated as a rotational force is input; a plurality of driving gears (310, 340)) coupled to the driving shaft and rotated by a rotation of the driving shaft; a plurality of transmission gears (320, 330) engaged with the driving gears (310, 340); a transmission shaft including a plurality of pawls (600, 610, 620) protruding and retracting from an outer peripheral surface, coupled to the transmission gears (320, 330), and selectively coupled to at least some of the transmission gears (320, 330) according to the protruding/retracting of the pawls; a gear shifting control part configured to selectively control the protruding/retracting of the pawls (600, 610, 620 a plurality of driven gears (310, 340) engaged with at least some of the transmission gears (320, 330); and a driven shaft coupled to the plurality of driven gears (310, 340) and configured to transmit a rotation force to an object to be driven, characterized in that the gear shifting control part comprises: a plurality of guide members (400, 401, 402, 403, 404, 405) arranged in a hollow part of the transmission shaft, moved in a lengthwise direction of the transmission shaft, and accordingly coming into selective contact with the plurality of pawls (600, 610, 620), and configured to guide the protruding/retracting of the plurality of pawls (600, 610, 620); a plurality of guide rods (410, 411, 412, 413, 414, 415) of which one sides are each connected to one of the plurality of guide members (400, 401, 402, 403, 404, 405); a wire for gear shifting; and a gear shifting channel rotated by the wire and comprising a gear shifting guide groove (510, 530) formed to have a predetermined radius and a predetermined length, and wherein the plurality of guide rods (410, 411, 412, 413, 414, 415) have the other sides in contact with the gear shifting channel, are selectively inserted into the gear shifting guide grooves (510, 530) as the gear shifting channel is rotated, and thus selectively move the guide members (400, 401, 402, 403, 404, 405). a plurality of guide members (400, 401, 402, 403, 404, 405) arranged in a hollow part of the transmission shaft, moved in a lengthwise direction of the transmission shaft, and accordingly coming into selective contact with the plurality of pawls (600, 610, 620), and configured to guide the protruding/retracting of the plurality of pawls (600, 610, 620); a plurality of guide rods (410, 411, 412, 413, 414, 415) of which one sides are each connected to one of the plurality of guide members (400, 401, 402, 403, 404, 405); a wire for gear shifting; and a gear shifting channel rotated by the wire and comprising a gear shifting guide groove (510, 530) formed to have a predetermined radius and a predetermined length, and wherein the plurality of guide rods (410, 411, 412, 413, 414, 415) have the other sides in contact with the gear shifting channel, are selectively inserted into the gear shifting guide grooves (510, 530) as the gear shifting channel is rotated, and thus selectively move the guide members (400, 401, 402, 403, 404, 405).