To provide a resin particle which is excellent in charging characteristics, heat-resistant storage stability, and heat characteristics and is uniform in particle diameter.

This core-shell type resin particle (C) composed of one or more coating film-like shell layers (P) comprising the first resin (a) and one core layer (Q) comprising the second resin (b) is characterized in that the resin particle (C) contains 0.1 to 10 wt.% of a 6 to 20C carbonyl compound (E) having a melting point of 30 to 150C. The compound (E) is preferably a carboxylic acid (derivative).