An absorbent article with wing-shaped flaps (W,W) which are formed on both sides of the section of the main body where an absorbent body is interposed between a liquid-permeable surface sheet and a liquid-impermeable backing sheet and are each secured by wrapping around the crotch section of underwear when being attached, wherein said wing-shaped flaps (W,W) have a front side profile line that extends outwards from the main body section and a rear side profile line that extends outwards from the main body section, wherein the absorbent article is characterized in that said front side profile line is a wave-shaped line formed by a repetition of convex portions that protrude outwards and concave portions that protrude inwards and a straight line, connecting the vertex of the concave portion positioned in the most outwards position and the connecting point where the rear side profile line of said wing-shaped flaps (W,W) connects to the main body section of the absorbent article, is configured to be at an angle of 60-65° in relation to a line along the lateral direction of the absorbent article passing through said connecting point, wherein an angle formed by a directional line that passes through the connecting point where the front side profile line of said wing-shaped flaps (W,W) connects to the main body section of the absorbent article and that comes into contact with the convex portion positioned in the most outward position of said front side profile line and the line along the lateral direction of said absorbent article is defined as an angle (θ) formed by the line along the lateral direction of said absorbent article and said front side profile line, wherein when the rear side profile line of said wing-shaped flaps (W,W) is a straight line, an angle formed by this straight line and the line along the lateral direction of said absorbent article is defined as an angle (β) formed by the line along the lateral direction of said absorbent article and said rear side profile line, or when the rear side profile line of said wing-shaped flaps (W,W) is a wave-shaped line formed by a repetition of convex portions that protrude outwards and concave portions that protrude inwards, an angle formed by a directional line that passes through the connecting point where the rear side profile line of said wing-shaped flaps (W,W) connects to the main body section of the absorbent article and that comes into contact with the convex portion positioned in the most outward position of said rear side profile line and the line along the lateral direction of said absorbent article is defined as an angle (β) formed by the line along the lateral direction of said absorbent article and said rear side profile line and wherein the angle (β) formed by the line along the lateral direction of said absorbent article and said rear side profile line is configured to be greater than the angle (θ) formed by the line along the lateral direction of said absorbent article and said front side profile line while a center of gravity of said wing-shaped flaps (W,W) is offset to be on a front side of a center of a line where a base of the wing-shaped flap is connected to the main body section.