A compressor impeller , comprising: a hub ; and a blade group including a plurality of blades arranged along a circumferential direction on an outer peripheral surface of the hub , the blade group being configured such that hub-side ends of leading edges of the respective blades are aligned on the same circle, wherein the plurality of blades include at least one first blade and at least one second blade having a different shape from the at least one first blade , and wherein, when comparing a blade angle of a leading edge , which is the angle formed between a meridional direction (m) and the camber line of the blade at a certain blade height, of the at least one first blade to a blade angle of a leading edge of the at least one second blade at the same position in a radial direction of the compressor impeller , the blade angle of the leading edge of the at least one first blade is different from the blade angle of the leading edge of the at least one second blade , at least in a partial range in the radial direction of the compressor impeller ; wherein the number of the second blades in the blade group is smaller than the number of the first blades in the blade group , and wherein, when comparing the blade angle of the leading edges of the first blades to the blade angle of the leading edges of the second blades at the same position in the radial direction of the compressor impeller , the blade angle of the leading edges of the second blades is greater than the blade angle of the leading edges of the first blades at least in a partial range in the radial direction of the compressor impeller . a hub ; and a blade group including a plurality of blades arranged along a circumferential direction on an outer peripheral surface of the hub , the blade group being configured such that hub-side ends of leading edges of the respective blades are aligned on the same circle, wherein the plurality of blades include at least one first blade and at least one second blade having a different shape from the at least one first blade , and wherein, when comparing a blade angle of a leading edge , which is the angle formed between a meridional direction (m) and the camber line of the blade at a certain blade height, of the at least one first blade to a blade angle of a leading edge of the at least one second blade at the same position in a radial direction of the compressor impeller , the blade angle of the leading edge of the at least one first blade is different from the blade angle of the leading edge of the at least one second blade , at least in a partial range in the radial direction of the compressor impeller ; wherein the number of the second blades in the blade group is smaller than the number of the first blades in the blade group , and wherein, when comparing the blade angle of the leading edges of the first blades to the blade angle of the leading edges of the second blades at the same position in the radial direction of the compressor impeller , the blade angle of the leading edges of the second blades is greater than the blade angle of the leading edges of the first blades at least in a partial range in the radial direction of the compressor impeller . <EOS>