The present invention is designed so that it is possible to reduce the measurement-induced increase of load and power consumption in user terminals even when the number of component carriers that can be configured per user terminal is expanded. A user terminal communicates with a radio base station that configures groups (TAGs) comprised of one or more cells, and has a receiving section that receives information related to component carriers (CCs) included in the groups, and a measurement section that makes measurements on a per group basis based on the information related to the component carriers.