A coil component includes a body having one surface and the other surface facing each other, and a plurality of wall surfaces connecting the one surface and the other surface, and having a distance from the one surface to the other surface of 0.65 mm or less (excluding 0 mm); and a coil portion embedded in the body, wherein the body comprises an Fe—Si—B—Nb—Cu-based metal magnetic powder particle represented by the following chemical formula 1, wherein the Fe—Si—B—Nb—Cu-based metal magnetic powder particle comprises a crystal grain of 20 nm or less (excluding 0 mm), FeaSibBcNbdCue  [Chemical Formula 1] (where 73 atom %≤a≤77 atom %, 10 atom %≤b≤14 atom %, 9 atom%≤c≤11 atom %, 2 atom %≤d≤3 atom %, 0.5 atom %≤e≤1 atom %, and a+b+c+d+e=100).