Garment having shape-transformable collar

A garment having a shape-transformable collar comprising:

• a trunk part for surrounding a body of a wearer;
• and
• a collar coupled to the trunk part along a neck circumference seam of the trunk part,
• wherein the collar includes:
• an upper collar formed by coupling a plurality of fabric pieces and forming an outer appearance of the collar;
• and a collar band coupled between the upper collar and the trunk part,
• wherein the upper collar includes:
• a first straight portion corresponding to a back of a neck of the wearer;
• and a first curved portion corresponding to a front of the neck of the wearer and connected to the first straight portion,
• wherein the collar band includes:
• a second straight portion of the back of the neck of the wearer;
• and a second curved portion corresponding to the front of the neck of the wearer and connected to the second straight portion, and
• wherein the first straight portion and the second straight portion are coupled to and correspond to each other, the first curved portion and the second curved portion have different curvatures and are coupled to and correspond to each other, the first curved portion has a higher curvature than the second curved portion, and when the upper collar is positioned upright, the upper collar is maintained in an upright state by coupling the first curved portion and the second curved portion.