A process for producing diaryl carbonate which comprises (A) a step for producing dialkyl carbonate represented by the general formula RO--CO--OR by reacting urea with alkyl alcohol represented by the general formula ROH, (B) a step for producing both alkyl aryl carbonate represented by the general formula RO--CO--OAr and diaryl carbonate represented by the general formula ArO--CO--OAr by reacting dialkyl carbonate produced in the above step (A) with an aromatic hydroxy compound represented by the general formula ArOH, and (C) a step for producing diaryl carbonate represented by the general formula ArO--CO--OAr by allowing to conduct disproportionation reaction of unreacted alkyl aryl carbonate produced in the above step (B), wherein R shows an alkyl group and Ar shows a non-substituted phenyl group or a phenyl group substituted by alkyl group, alkoxy group, aryl group, aryloxy group or halogen.