A foldable comfortable mask comprises a mask body. A plurality of folding units are arranged on the mask body and arranged on the mask body side by side, each folding unit comprises a short linear fold and two triangular folds, the triangular folds are isosceles triangles, the bottom edges of the two triangular folds of each folding unit coincide, the two ends of the bottom edges are connected with the short linear folds, and the short linear folds are parallel to the bottom edges. The folding units are turned inwards along the bottom edges and turned outwards along the equal sides of the triangular folds, and the folding units are turned outwards along the short linear folds. Due to the fact that each folding unit is provided with the two triangular folds arranged in the opposite directions, the two sides of the mask body are folded to be close to the middle after being folded, and the length of the folded mask body is reduced. The triangular folds have good mechanical strength, the protruding state of the middle of the mask body is kept stable, and the defects that the middle of a mask is prone to collapse and deform when worn and is in contact with the mouth and nose are overcome.