  We computed the NLO corrections to twist-3, $L \to T$, flavor non-singlet
amplitude in DVCS on a nucleon in the Wandzura-Wilczek approximation. Explicit
calculation shows that factorization holds for NLO contribution to this
amplitude, although the structure of the factorized amplitude at the NLO is
more complicated than in the leading-order formula. Next-to-leading order
coefficient functions for matrix elements of twist-3 vector and axial-vector
quark string operators and their LO evolution equations are presented.
