The present invention is to solve conventional problems, namely, that when an attempt is made to obtain a thick, in-mold foamed molded article with excellent fusibility between beads formed from an acrylic resin expanded beads, cooling takes an extremely long time and production efficiency is poor, and to provide acrylic resin expanded beads with which an in-mold foamed molded article with excellent fusibility between expanded beads can be manufactured in a short cooling time even with a thick foamed molded article such as a block foamed molded article, and the molding cycle can be improved. The acrylic resin expanded beads of the present invention are expanded beads in which an acrylic resin serves as a base resin, and the bead surfaces have continuous ridges in a mesh pattern.