A method for performing device to device (D2D) communication in a wireless communication system and a user equipment for the method are disclosed. The method for allowing a D2D user equipment to perform D2D communication comprises the steps of determining at least one D2D communication group a of a plurality of D2D communication groups; and giving RNTI corresponding to the determined at least one D2D communication group a to a D2D transmitting user equipment i and a D2D receiving user equipment j of a D2D link (i, j), wherein the step of determining at least one D2D communication group a of a plurality of D2D communication groups includes determining the at least one D2D communication group a, which satisfies a first condition and a second condition, by receiving information on the at least one D2D communication group, which satisfies the first condition, from the D2D receiving user equipment j and receiving information on the at least one D2D communication group, which satisfies the second condition, from the D2D transmitting user equipment i, and the second condition is obtained by receiving a first group interference value from the D2D receiving user equipment within the plurality of D2D communication groups, determining a minimum value of the first group interference value as a second group interference value, and transmitting the second group interference value to the D2D transmitting user equipment i.