  We calculate the width of the Roper resonance at next-to-leading order in a
systematic expansion of baryon chiral perturbation theory with pions, nucleons,
and the delta and Roper resonances as dynamical degrees of freedom. Three
unknown low-energy constants contribute up to the given order. One of them can
be fixed by reproducing the empirical value for the width of the Roper decay
into a pion and a nucleon. Assuming that the remaining two couplings of the
Roper interaction take values equal to those of the nucleon, the result for the
width of the Roper decaying into a nucleon and two pions is consistent with the
experimental value.
