  The Cachazo-Svrcek-Witten (CSW) rule for efficiently calculating gauge theory
amplitudes is extended to N=1 supersymmetric QCD (SQCD), incorporating massless
quarks, in a way preserving the manifest supersymmetry. Using this extended CSW
rule, we obtain compact expressions of all the one-loop MHV amplitudes in SQCD
including one or two external quark-antiquark (chiral-antichiral multiplets)
pairs. The collinear sigularities of the five point amplitudes are investigated
to confirm the consistency of the results.
