According to an embodiment of the present invention, a folding cup comprises: a body part forming an outer wall of the folding cup; and a bottom part blocking one side of the body part. The body part has a plurality of supporting lines and folding lines on both sides of the folding cup. At least one point of each folding line is positioned to protrude to the outside of an imaginary line connecting the upper end point of the main body part with the lower end point thereof. When the protruding point of the folding line is pressurized, the protruding point enters the inside of the folding cup to maintain the shape of the folding cup. The original shape of the folding cup can be maintained regardless of the direction where the folding cup is held.
