An apparatus for treating laundry, comprising: a front cover that forms a front surface and that includes a backward bent portion (12a1) at an upper end portion of the front surface extending in a backward direction; a pair of side covers that form both flank surfaces, respectively, a back cover that forms a rear-side surface; an outer tank provided for holding water and positioned inside the front cover , the pair of side covers and the back cover ; an inner tank that is positioned rotatably inside the outer tank and providing for holding laundry; a motor for rotating the inner tank ; a front member that is connected to the backward bent portion (12a1) and that extends in a leftward-rightward direction along the backward bent portion (12a1); and a top cover that is connected to an upper end of the front cover , upper ends of the pair of side covers and an upper end of the back cover , characterized by a hanger that is fixed to upper-side both-end portions of the front cover ; a tension member of which one end is connected to the hanger and of which the other end is connected to the outer tank ; wherein the front member includes: a pair of hanger connection units arranged on both end portions of the front member , respectively, and connected to the hanger ; a gap formation portion that is positioned by a distance upward from an upper-side surface of the backward bent portion (12a1) and thus forms a gap (g); and a fixation portion that is connected to the upper-side surface of the backward bent portion ; wherein the top cover includes a backward protrusion portion that protrudes backward from a front lower end of the top cover and is inserted into the gap (g). a front cover that forms a front surface and that includes a backward bent portion (12a1) at an upper end portion of the front surface extending in a backward direction; a pair of side covers that form both flank surfaces, respectively, a back cover that forms a rear-side surface; an outer tank provided for holding water and positioned inside the front cover , the pair of side covers and the back cover ; an inner tank that is positioned rotatably inside the outer tank and providing for holding laundry; a motor for rotating the inner tank ; a front member that is connected to the backward bent portion (12a1) and that extends in a leftward-rightward direction along the backward bent portion (12a1); and a top cover that is connected to an upper end of the front cover , upper ends of the pair of side covers and an upper end of the back cover , characterized by a hanger that is fixed to upper-side both-end portions of the front cover ; a tension member of which one end is connected to the hanger and of which the other end is connected to the outer tank ; wherein the front member includes: a pair of hanger connection units arranged on both end portions of the front member , respectively, and connected to the hanger ; a gap formation portion that is positioned by a distance upward from an upper-side surface of the backward bent portion (12a1) and thus forms a gap (g); and a fixation portion that is connected to the upper-side surface of the backward bent portion ; a pair of hanger connection units arranged on both end portions of the front member , respectively, and connected to the hanger ; a gap formation portion that is positioned by a distance upward from an upper-side surface of the backward bent portion (12a1) and thus forms a gap (g); and a fixation portion that is connected to the upper-side surface of the backward bent portion ; wherein the top cover includes a backward protrusion portion that protrudes backward from a front lower end of the top cover and is inserted into the gap (g). <EOS>