A power inductor comprising: a body comprising magnetic powder and a polymer; at least one base provided in the body and having at least one surface on which at least one coil pattern is disposed; and an insulation layer disposed between the coil pattern and the body, wherein the magnetic powder in the body comprises at least three magnetic powders comprising a first magnetic powder, a second magnetic powder and a third magnetic powder having different mean values of particle sizes or different middle values of grain-size distribution, wherein the base is removed to form a through-hole inside the coil pattern and the base is removed outside the coil pattern, wherein the insulation layer covers the base as well as the top and side surfaces of the coil pattern such that the insulation layer is disposed on a side surface of the through-hole and outer surfaces of the base which are exposed by the coil pattern, wherein the body comprises a first thickness region which comes into contact with the insulation layer, the first thickness region having a predetermined thickness from the surface of the insulation layer and being manufactured by containing the third magnetic powder having the smallest size in which the mean value of the particle sizes or the middle value of the grain-size distribution is lowest, wherein the body is filled into the removed portions of the base including the through-hole, and a remaining region of the body adjacent the first thickness region and filling the removed portions of the base including the through-hole is formed by mixing the first to third magnetic powders including the first and second magnetic powders in which the mean value of the particle sizes or the middle value of the grain-size distribution is larger than of the third magnetic powder. a body comprising magnetic powder and a polymer; at least one base provided in the body and having at least one surface on which at least one coil pattern is disposed; and an insulation layer disposed between the coil pattern and the body, wherein the magnetic powder in the body comprises at least three magnetic powders comprising a first magnetic powder, a second magnetic powder and a third magnetic powder having different mean values of particle sizes or different middle values of grain-size distribution, wherein the base is removed to form a through-hole inside the coil pattern and the base is removed outside the coil pattern, wherein the insulation layer covers the base as well as the top and side surfaces of the coil pattern such that the insulation layer is disposed on a side surface of the through-hole and outer surfaces of the base which are exposed by the coil pattern, wherein the body comprises a first thickness region which comes into contact with the insulation layer, the first thickness region having a predetermined thickness from the surface of the insulation layer and being manufactured by containing the third magnetic powder having the smallest size in which the mean value of the particle sizes or the middle value of the grain-size distribution is lowest, wherein the body is filled into the removed portions of the base including the through-hole, and a remaining region of the body adjacent the first thickness region and filling the removed portions of the base including the through-hole is formed by mixing the first to third magnetic powders including the first and second magnetic powders in which the mean value of the particle sizes or the middle value of the grain-size distribution is larger than of the third magnetic powder.