A layered transmission apparatus transmitting information regarding a plurality of layers includes: coding units coding an information bit of a corresponding layer to generate code bits; bit interleaving units bit-interleaving a corresponding code bit to generate interleaved symbols; a modulation unit classifying layers into layer groups, and modulating interleaved symbols corresponding to each of the groups to generate a modulation symbol of each of the groups; a gain control unit controlling gain of the modulation symbol of each of the groups; and an adding unit adding gain-controlled modulation symbols of the groups to generate a transmission symbol.