Provided are polypropylene resin pre-foamed particles including, as base resin, polypropylene resin that satisfies the following requirements (a) through (c): (a) in cross fractionation chromatography, an amount of components eluted at a temperature of not more than 40°C is not more than 2.0 % by weight (b) a melting point is not less than 100°C but not more than 160°C and (c) propylene monomer units are present in an amount of not less than 90 mol% but not more than 100 mol%, and olefin units each having a carbon number of 2 or 4 or more are present in an amount of not less than 0 mol% but not more than 10 mol%. The polypropylene resin pre-foamed particles can be molded by in-mold foaming molding at a not high molding heating steam pressure, and a polypropylene resin in-mold foaming molded product excellent in dimensional stability at high temperatures can be prepared from the polypropylene resin pre-foamed particles.
