In an electrophotographic endless belt having a resin layer formed of a resin composition containing a polyamide, the resin composition further contains a copolymer obtained by copolymerization of an olefin and an oxygen-containing heterocyclic compound, a curve (T-log.sub.10 .eta. curve) showing the relationship between temperature T (.degree. C.) and common logarithm log.sub.10 .eta. of melt viscosity .eta. (Pas), of the resin composition has, in the range of log.sub.10 .eta. of from log.sub.10 1,000 to log.sub.10 8,000, a gently inclined region the inclination .DELTA. log.sub.10 .eta./.DELTA.T of which is from -0.02 to 0, and the gently inclined region has a temperature range of 10.degree. C. or more, and the resin layer has a thickness the maximum thickness of which is 115% or less of the average value of the thickness of the resin layer and the minimum thickness of which is 85% or more of the average value of the thickness of the resin layer. Also disclosed is a process for producing the above electrophotographic endless belt.