A laundry treating apparatus, comprising: a main body having a front panel disposed with a laundry inlet port; a laundry accommodating portion disposed inside the main body and configured to receive laundry to an inside of the laundry accommodating portion through the laundry inlet port; and a door rotatably provided on the front panel to open and close the laundry inlet port, wherein the door comprises: - an outer frame provided with an opening portion, and disposed toward an outer side of the main body; - a transparent front panel attached to a front surface of the outer frame to cover the opening portion of the outer frame; and - an inner frame disposed at a rear of the outer frame toward an inner side of the main body and coupled to the outer frame; and wherein the outer frame comprises: an adhesive filling portion (43, 441, 442) provided on the front surface of the outer frame and configured to accommodate an adhesive for bonding the transparent front panel to the front surface of the outer frame; and a reinforcing portion (40, 41, 42) provided on a rear surface of the outer frame, and disposed to correspond to the adhesive filling portion (43, 441, 442) for reinforcing a part of the outer frame that comprises the adhesive filling portion (43, 441, 442); wherein the adhesive filling portion (43, 441, 442) comprises: an adhesive filling groove recessed into the front surface of the outer frame and configured to accommodate the adhesive; and at least one adhesive overflow groove (441, 442) recessed into the front surface of the outer frame and configured to accommodate the adhesive overflowing from the adhesive filling groove when the transparent front panel is attached, wherein the at least one adhesive overflow groove (441, 442) is radially spaced apart from the adhesive filling groove on the front surface of the outer frame characterized in that the reinforcing portion (40, 41, 42) is disposed to overlap at an opposite side of the adhesive overflow groove (441, 442) in a thickness direction of the outer frame. a main body having a front panel disposed with a laundry inlet port; a laundry accommodating portion disposed inside the main body and configured to receive laundry to an inside of the laundry accommodating portion through the laundry inlet port; and a door rotatably provided on the front panel to open and close the laundry inlet port, wherein the door comprises: - an outer frame provided with an opening portion, and disposed toward an outer side of the main body; - a transparent front panel attached to a front surface of the outer frame to cover the opening portion of the outer frame; and - an inner frame disposed at a rear of the outer frame toward an inner side of the main body and coupled to the outer frame; and - an outer frame provided with an opening portion, and disposed toward an outer side of the main body; - a transparent front panel attached to a front surface of the outer frame to cover the opening portion of the outer frame; and - an inner frame disposed at a rear of the outer frame toward an inner side of the main body and coupled to the outer frame; and wherein the outer frame comprises: an adhesive filling portion (43, 441, 442) provided on the front surface of the outer frame and configured to accommodate an adhesive for bonding the transparent front panel to the front surface of the outer frame; and a reinforcing portion (40, 41, 42) provided on a rear surface of the outer frame, and disposed to correspond to the adhesive filling portion (43, 441, 442) for reinforcing a part of the outer frame that comprises the adhesive filling portion (43, 441, 442); wherein the adhesive filling portion (43, 441, 442) comprises: an adhesive filling groove recessed into the front surface of the outer frame and configured to accommodate the adhesive; and at least one adhesive overflow groove (441, 442) recessed into the front surface of the outer frame and configured to accommodate the adhesive overflowing from the adhesive filling groove when the transparent front panel is attached, wherein the at least one adhesive overflow groove (441, 442) is radially spaced apart from the adhesive filling groove on the front surface of the outer frame characterized in that the reinforcing portion (40, 41, 42) is disposed to overlap at an opposite side of the adhesive overflow groove (441, 442) in a thickness direction of the outer frame. an adhesive filling portion (43, 441, 442) provided on the front surface of the outer frame and configured to accommodate an adhesive for bonding the transparent front panel to the front surface of the outer frame; and a reinforcing portion (40, 41, 42) provided on a rear surface of the outer frame, and disposed to correspond to the adhesive filling portion (43, 441, 442) for reinforcing a part of the outer frame that comprises the adhesive filling portion (43, 441, 442); wherein the adhesive filling portion (43, 441, 442) comprises: an adhesive filling groove recessed into the front surface of the outer frame and configured to accommodate the adhesive; and at least one adhesive overflow groove (441, 442) recessed into the front surface of the outer frame and configured to accommodate the adhesive overflowing from the adhesive filling groove when the transparent front panel is attached, wherein the at least one adhesive overflow groove (441, 442) is radially spaced apart from the adhesive filling groove on the front surface of the outer frame characterized in that the reinforcing portion (40, 41, 42) is disposed to overlap at an opposite side of the adhesive overflow groove (441, 442) in a thickness direction of the outer frame.