  Lattice QCD with Wilson quarks and a chirally twisted mass term (tmQCD) has
been introduced in refs. [1,2]. We here apply Symanzik's improvement programme
to this theory and list the counterterms which arise at first order in the
lattice spacing a. Based on the generalised transfer matrix, we define the
tmQCD Schrodinger functional and use it to derive renormalized on-shell
correlation functions. By studying their continuum approach in perturbation
theory we then determine the new O(a) counterterms of the action and of a few
quark bilinear operators to one-loop order.
