A user apparatus for use in a mobile communication system that supports D2D communication, including: a signal transmission unit configured to transmit a plurality of D2D signals; and a resource selection unit configured to select, from a predetermined resource pool, a radio resource having a time resource and a frequency resource for transmitting the plurality of D2D signals, wherein the resource selection unit is configured to select the radio resource such that the plurality of D2D signals are not transmitted by a same time resource.