Lubricating grease composition

A lubricating grease composition for a resin member used to be supplied as a lubricant on a surface of at least a sliding portion of a resin member including the sliding portion with another member, wherein the lubricating grease composition for a resin member contains

• a base oil which consists of a mixed oil of:
• a poly-α-olefin having a kinetic viscosity at 40° C. of 18 to 30 mm2/s, and an ethylene-α-olefin copolymer having a number average molecular weight of 40,000 to 200,000,
• a lithium-based complex soap as a thickener, and
• a polytetrafluoroethylene resin as a solid lubricant having a mixing ratio of 4 to 12 mass % to the entire lubricating grease composition,
• wherein the base oil, which is the mixed oil of the poly-α-olefin and the ethylene-α-olefin copolymer, has a kinetic viscosity at 40° C. of 80 to 200 mm2/s, and
• a worked penetration of the lubricating grease composition ranges from 295 to 340.