A dryer comprising: a drum including a drum body providing a space for storing clothes, a front cover forming a front surface of the drum body, a rear cover forming a rear surface of the drum body, and a drum inlet penetrating through the front cover and communicating with the inside of the drum body; a fixing panel provided at a position apart from the rear cover; a motor including a stator fixed to the fixing panel and a rotor rotated by the stator; a hollow housing (60a, 60b) fixed to the fixing panel; a first shaft (63a, 63b) having one end fixed to the rotor and the other end provided with a driving gear (631a, 631b) located inside the housing; a second shaft (652a, 652b) having one end provided with a driven gear (65a, 65b) located inside the housing and the other end penetrating through the fixing panel and fixed to the rear cover; and a plurality of interlocking gears (64a, 64b) provided rotatably in the housing and transmitting a rotational force of the driving gear (631a, 63 1b) to the driven gear (65a, 65b), wherein a driving gear shaft (632a, 632b) is formed on the other end portion of the first shaft (63a, 63b), and a first shaft hole (653a, 653b) for allowing the driving gear shaft (632a, 632b) to be inserted therethrough is formed on an end portion of the second shaft (652a, 652b), to make the first shaft (63a, 63b) and the second shaft (652a, 652b) rotate on the same rotation axis, wherein the first shaft (63a, 63b) and the driven gear (65a, 65b) are rotatably coupled with each other in a coaxial state by inserting the driving gear shaft (632a, 632b) into the first shaft hole (653a, 653b), and characterized in that each of the interlocking gears (64a, 64b) comprises a first gear (642a, 642b) rotating while being meshed with the driving gear (631a, 631b), and a second gear (644a, 644b) rotating coaxially with the first gear (642a, 642b) and meshed with the driven gear (65a, 65b), with a smaller diameter than the first gear (642a, 642b). a drum including a drum body providing a space for storing clothes, a front cover forming a front surface of the drum body, a rear cover forming a rear surface of the drum body, and a drum inlet penetrating through the front cover and communicating with the inside of the drum body; a fixing panel provided at a position apart from the rear cover; a motor including a stator fixed to the fixing panel and a rotor rotated by the stator; a hollow housing (60a, 60b) fixed to the fixing panel; a first shaft (63a, 63b) having one end fixed to the rotor and the other end provided with a driving gear (631a, 631b) located inside the housing; a second shaft (652a, 652b) having one end provided with a driven gear (65a, 65b) located inside the housing and the other end penetrating through the fixing panel and fixed to the rear cover; and a plurality of interlocking gears (64a, 64b) provided rotatably in the housing and transmitting a rotational force of the driving gear (631a, 63 1b) to the driven gear (65a, 65b), wherein a driving gear shaft (632a, 632b) is formed on the other end portion of the first shaft (63a, 63b), and a first shaft hole (653a, 653b) for allowing the driving gear shaft (632a, 632b) to be inserted therethrough is formed on an end portion of the second shaft (652a, 652b), to make the first shaft (63a, 63b) and the second shaft (652a, 652b) rotate on the same rotation axis, wherein the first shaft (63a, 63b) and the driven gear (65a, 65b) are rotatably coupled with each other in a coaxial state by inserting the driving gear shaft (632a, 632b) into the first shaft hole (653a, 653b), and characterized in that each of the interlocking gears (64a, 64b) comprises a first gear (642a, 642b) rotating while being meshed with the driving gear (631a, 631b), and a second gear (644a, 644b) rotating coaxially with the first gear (642a, 642b) and meshed with the driven gear (65a, 65b), with a smaller diameter than the first gear (642a, 642b).