A lubricant-containing synthetic resin composition, prepared by pre-mixing 2 to 40% by volume of a lubricant consisting of at least one lubricant oil and/or at least one oilinessincreasing agent, with at least one carrier which is an organic or inorganic powder having a melting point higher than the molding temperature of a base synthetic resin, a specific surface area of at least 0.3 m.sup.2 /g and a limited amount of oil absorbed of at least 0.2 cc/carrier cc, and then mixing the mixture with the base synthetic resin, or mixing the lubricant, carrier and base synthetic resin simultaneously, and then molding the resulting mixture, the amount of the lubricant being not more than 10.0 times the limit amount of oil absorbed by the carrier.