Crosslinked resin particles and production thereof

A process for preparing crosslinked resin particles which comprises dispersing in an aqueous medium a water-dispersible resin having both water-dispersible groups and self-crosslinkable groups in one molecule and then three-dimensionally crosslinking said resin, wherein said water-dispersible groups are selected from the group consisting of nonionic groups, ionic groups, and amphoteric groups, and said self-crosslinkable groups are selected from the group consisting of methacryloyl groups, acryloyl groups, 2-(1-carboxypropenoyl) groups and a combination of groups reactive with each other selected from a combination of oxirane and carboxyl groups or a combination of hydroxyl and alkoxy groups.