We suggest a relativistic field theory model of the deuteron. We start
from a local unphysical deuteron field, taken as a bound proton-neutr
on state at zero binding energy. Following the Nambu-Jona-Lasinio pres
cription we construct the physical deuteron field. We describe all par
ameters of the physical deuteron in the one-nucleon loop approximation
and in leading order of the long-wavelength expansion. The one-pion e
xchange contribution to the binding energy calculated in the two-nucle
on loop approximation is found small compared with that obtained in th
e one-nucleon loop one. The present model can be applied to the descri
ption of the decouplet of dibaryons <(10)under bar><over tilde>(f) whe
re the deuteron is the component with Y = 2 and I = 0.