To provide a pellet mixture for connectors which indicates a uniform metering time in molding with good and stable releasability, and is used appropriately for a harness connector and improved in toughness.

A pellet mixture is prepared by mixing the master batch pellets A of polybutylene terephthalate resin composition containing 1-30 wt.% of a polyester elastomer (A-1) and 0.1-5 wt.% of a mold release agent in a weight ratio A/B of 2/98-50/50. The pellet mixture for connectors contains 0.5-5 wt.% of the polyester elastomer (A-1) and an effective amount of the mold release agent (A-2).