We report results on the static quark potential in two-flavor full QCD. The calculation is performed for three values of lattice spacing a(-1) approximate to 0.9, 1.3 and 2.5 GeV on 12(3) x 24, 16(3) x 32 and 24(3) x 48 lattices respectively, at sea quark masses corresponding to m(pi)/m(p) approximate to 0.8-0.6. An RG-improved gauge action and a tadpole-improved SW clover quark action are employed. We discuss scaling of m(p)/root sigma and effects of dynamical quarks on the potential.