A simple argument is presented in favour of the equidistant spectrum for the horizon area of a black hole in semiclassical limit. The following quantization rules for the mass M_N and horizon area A_Nj are proposed: M_N = m_p[N(N + 1)]^1/4; A_Nj = 8πl² _p[√N(N + 1) + √N(N + 1) - j(j + 1)]. Here both N and j are nonnegative integers or half-integers.