A clothes folding device which functions to perform folding in a process of transporting clothes, the clothes folding device comprising: a loading assembly which pushes in the clothes and seats the clothes on a loading conveyor for transportation; a folding assembly which transports the clothes forward or backward and performs the folding of the clothes; an unloading assembly which is provided below the folding assembly and loads the clothes discharged from the folding assembly, wherein the unloading assembly comprises: an upper unloading layer where the clothes finally folded by the folding assembly is primarily dropped and seated and which comprises an unloading conveyor; a rotation drive unit which drives such that the unloading conveyor rotates; an upper front-rear drive unit which moves the upper unloading layer in a forward and backward direction; a lower unloading layer where the clothes seated on the upper unloading layer are secondarily dropped and seated; and an up and down drive unit which moves the lower unloading layer in an up or down direction, characterized in that a ratio of a front-rear width of the upper unloading layer with respect to a space that the upper unloading layer occupies in the forward and backward direction is in a range of 0.28 to 0.36, and a ratio of a front-rear stroke distance of the upper unloading layer with respect to the space that the upper unloading layer occupies in the forward and backward direction is in a range of 0.5 to 0.65. a loading assembly which pushes in the clothes and seats the clothes on a loading conveyor for transportation; a folding assembly which transports the clothes forward or backward and performs the folding of the clothes; an unloading assembly which is provided below the folding assembly and loads the clothes discharged from the folding assembly, wherein the unloading assembly comprises: an upper unloading layer where the clothes finally folded by the folding assembly is primarily dropped and seated and which comprises an unloading conveyor; a rotation drive unit which drives such that the unloading conveyor rotates; an upper front-rear drive unit which moves the upper unloading layer in a forward and backward direction; a lower unloading layer where the clothes seated on the upper unloading layer are secondarily dropped and seated; and an up and down drive unit which moves the lower unloading layer in an up or down direction, characterized in that a ratio of a front-rear width of the upper unloading layer with respect to a space that the upper unloading layer occupies in the forward and backward direction is in a range of 0.28 to 0.36, and a ratio of a front-rear stroke distance of the upper unloading layer with respect to the space that the upper unloading layer occupies in the forward and backward direction is in a range of 0.5 to 0.65. an upper unloading layer where the clothes finally folded by the folding assembly is primarily dropped and seated and which comprises an unloading conveyor; a rotation drive unit which drives such that the unloading conveyor rotates; an upper front-rear drive unit which moves the upper unloading layer in a forward and backward direction; a lower unloading layer where the clothes seated on the upper unloading layer are secondarily dropped and seated; and an up and down drive unit which moves the lower unloading layer in an up or down direction, characterized in that a ratio of a front-rear width of the upper unloading layer with respect to a space that the upper unloading layer occupies in the forward and backward direction is in a range of 0.28 to 0.36, and a ratio of a front-rear stroke distance of the upper unloading layer with respect to the space that the upper unloading layer occupies in the forward and backward direction is in a range of 0.5 to 0.65.