According to the present invention, a foldable drying apparatus includes: a support part to be unfolded in a shape of an inverse V; a plank part pivotally coupled to the support part; a holding module pivotally coupled to the support part to support a load of the plank part; and a link part coupled to the support partso as to be correspondingly folded according to a folding shape of the support part. The holding module includes a holding length rod for connecting the support partwith the plank part, a fixing part arranged at an outer portion of the holding length rod to support the plank part, a hook part pivotally coupled to the fixing part, and an elastic body arranged between the fixing part and the hook part. When an arranging angle of the plank part is adjusted, the plank partis released from the fixing part and slides along an upper inside of the hook part. Therefore, the plank part is easily adjusted by only controlling the plank part.