The present invention provides a process for producing a variety of unsaturated carbamic acid derivatives from corresponding unsaturated carbamates by substitution reaction. The present invention provides a process for producing unsaturated carbamic acid derivatives, comprising reacting an unsaturated carbamate represented by

   wherein R represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R¹ represents a residue of an alcohol from which an OH group is removed,
with an alcohol, a primary or secondary amine or an oxime at a temperature of 80 to 150 °C to substitute the -OR¹ group in the formula (A).