One disclosure of the present specification provides a method of receiving a signal based on signal quality in a device to device (D2D) communication. The method may include: receiving a signal from the other terminal; measuring signal quality for each of a plurality of physical resource block (PRB) regions included in a frequency region in which the signal can be received; choosing a candidate PRB region for which demodulation is performed among the plurality of PRB regions on the basis of the measured signal quality; and performing demodulation on the candidate PRB region.