A film dressing comprising: a film dressing body having a film and an adhesive layer provided on one face of the film; a release liner releasably laminated covering an adhesive face of the adhesive layer; and a carrier releasably laminated covering the other face of the film, wherein the carrier has a carrier-dividing portion that divides the outer shape thereof, whereby the carrier is divided into a carrier first portion and a carrier second portion, a flap layer that covers the carrier-dividing portion is further laminated on the carrier, the flap layer having a flap layer-dividing portion that divides the outer shape thereof, whereby the flap layer is divided into a flap layer first portion and a flap layer second portion, and a partial region of the flap layer first portion being joined to the carrier first portion so as to leave a holding margin, and a partial region of the flap layer second portion being joined to the carrier second portion so as to leave a holding margin, characterized in that the flap layer first portion and the flap layer second portion are in contact with each other at the flap layer-dividing portion, wherein the flap layer first portion is joined to the carrier first portion in a region in the vicinity of the carrier-dividing portion, and the flap layer second portion is joined to the carrier second portion in a region in the vicinity of the carrier-dividing portion, and wherein each distance from an end face of the carrier-dividing portion to a bonding portion of the flap layer first portion and to a bonding portion of the flap layer second portion is 0.5 mm - 5 mm. a film dressing body having a film and an adhesive layer provided on one face of the film; a release liner releasably laminated covering an adhesive face of the adhesive layer; and a carrier releasably laminated covering the other face of the film, wherein the carrier has a carrier-dividing portion that divides the outer shape thereof, whereby the carrier is divided into a carrier first portion and a carrier second portion, a flap layer that covers the carrier-dividing portion is further laminated on the carrier, the flap layer having a flap layer-dividing portion that divides the outer shape thereof, whereby the flap layer is divided into a flap layer first portion and a flap layer second portion, and a partial region of the flap layer first portion being joined to the carrier first portion so as to leave a holding margin, and a partial region of the flap layer second portion being joined to the carrier second portion so as to leave a holding margin, characterized in that the flap layer first portion and the flap layer second portion are in contact with each other at the flap layer-dividing portion, wherein the flap layer first portion is joined to the carrier first portion in a region in the vicinity of the carrier-dividing portion, and the flap layer second portion is joined to the carrier second portion in a region in the vicinity of the carrier-dividing portion, and wherein each distance from an end face of the carrier-dividing portion to a bonding portion of the flap layer first portion and to a bonding portion of the flap layer second portion is 0.5 mm - 5 mm.