  We analyze the quark mass dependence of the Roper mass to one-loop order in
relativistic baryon chiral perturbation theory. The loop integrals are
evaluated using infrared regularization which preserves chiral symmetry and
establishes a chiral counting scheme. The derived chiral expansion of the Roper
mass may prove useful for chiral extrapolations of lattice data. For couplings
of natural size the quark mass dependence of the Roper mass is similar to the
one of the nucleon.
