The measureddV/dI(V)curves of point contacts between the intermetallic compoundCeRu2in the superconducting state and the normal metal Cu correspond fairly well to the Blonder–Tinkham–Klapwijk model. It is used to obtain temperature and magnetic field dependence of the superconducting gap &Dgr;. The&Dgr;(T)dependence corresponds well to the BCS theory with2&Dgr;(0)/kBTc*=3.1±0.1.Additionally, a region of gapless superconductivity betweenTc*≃4.4−5.4 KandTcbulk≃6.2 Kis found. The gap decreases approximately linearly in a magnetic field and vanishes in a fieldBc*≃3.5 T,which is well below the upper critical fieldBc2≃6 Tand close to the irreversibility field. ©1998 American Institute of Physics.