A centrifugal compressor impeller, comprising: a plurality of full blades that stand equally spaced in a circumferential direction and extend from a fluid inlet part to a fluid outlet part on a surface of a hub; and two or more splitter blades (7,8) each provided to extend from a point in a flow passage formed between the full blades arranged adjacent to each other, to the outlet part, the splitter blades further comprising: a first splitter blade provided on a side nearer to a suction side of a full blade located upstream in a rotating direction of the compressor and having a length in a flow passage direction shorter than that of the upstream side full blade; and a second splitter blade provided on a suction side of the first splitter blade and having a length in the flow passage direction shorter than that of the first splitter blade, characterised in that leading edge portions (7a,8a) on a shroud side of the first splitter blade and the second splitter blade are offset from positions dividing a space between the full blades at equal intervals by the number of splitter blades therebetween toward the suction side of the full blade, and an offset amount (Δθ2) of the leading edge portion at the shroud side of the second splitter blade, from the position at which the space between the full blades is divided by the second splitter blade to the position of the leading edge portion of the second splitter blade, is larger than an offset amount (Δθ1) of the leading edge portion at the shroud side of the first splitter blade, from the position at which the space between the full blades is divided by the first splitter blade to the position of the leading edge portion of the first splitter blade. a plurality of full blades that stand equally spaced in a circumferential direction and extend from a fluid inlet part to a fluid outlet part on a surface of a hub; and two or more splitter blades (7,8) each provided to extend from a point in a flow passage formed between the full blades arranged adjacent to each other, to the outlet part, the splitter blades further comprising: a first splitter blade provided on a side nearer to a suction side of a full blade located upstream in a rotating direction of the compressor and having a length in a flow passage direction shorter than that of the upstream side full blade; and a second splitter blade provided on a suction side of the first splitter blade and having a length in the flow passage direction shorter than that of the first splitter blade, characterised in that leading edge portions (7a,8a) on a shroud side of the first splitter blade and the second splitter blade are offset from positions dividing a space between the full blades at equal intervals by the number of splitter blades therebetween toward the suction side of the full blade, and an offset amount (Δθ2) of the leading edge portion at the shroud side of the second splitter blade, from the position at which the space between the full blades is divided by the second splitter blade to the position of the leading edge portion of the second splitter blade, is larger than an offset amount (Δθ1) of the leading edge portion at the shroud side of the first splitter blade, from the position at which the space between the full blades is divided by the first splitter blade to the position of the leading edge portion of the first splitter blade. a first splitter blade provided on a side nearer to a suction side of a full blade located upstream in a rotating direction of the compressor and having a length in a flow passage direction shorter than that of the upstream side full blade; and a second splitter blade provided on a suction side of the first splitter blade and having a length in the flow passage direction shorter than that of the first splitter blade, characterised in that leading edge portions (7a,8a) on a shroud side of the first splitter blade and the second splitter blade are offset from positions dividing a space between the full blades at equal intervals by the number of splitter blades therebetween toward the suction side of the full blade, and an offset amount (Δθ2) of the leading edge portion at the shroud side of the second splitter blade, from the position at which the space between the full blades is divided by the second splitter blade to the position of the leading edge portion of the second splitter blade, is larger than an offset amount (Δθ1) of the leading edge portion at the shroud side of the first splitter blade, from the position at which the space between the full blades is divided by the first splitter blade to the position of the leading edge portion of the first splitter blade.