A monomer composition comprising a cyclic monomer and a polymerization inhibitor, the cyclic monomer being at least one monomer selected from the group consisting of a compound represented by the following formula (m11), a compound represented by the following formula (m12) and a compound represented by the following formula (m13), and the polymerization inhibitor being a polymerization inhibitor which satisfies the following requirements (a) to (d): (a) it is a 6-membered unsaturated cyclic hydrocarbon having from 1 to 4 substituents, (b) it has, as the substituent, at least one type selected from the group consisting of a t-butyl group, a methyl group, an isopropenyl group, an oxo group and a hydroxy group, (c) in a case where it has an oxo group as one type of the substituent, it has, as the substituent other than the oxo group, either one or both of a t-butyl group and a methyl group, and (d) in a case where it has a hydroxy group as the substituent, the number of the hydroxy group is only one; wherein R 11 , R 12 , R 14 and R 15 are each independently a fluorine atom, a C 1-10 perfluoroalkyl group or a group having an etheric oxygen atom in a carbon-carbon bond of a C 2-10 perfluoroalkyl group, and R 13 is a single bond, a C 1-10 perfluoroalkylene group or a group having an etheric oxygen atom in a carbon-carbon bond of a C 2-10 perfluoroalkylene group. the cyclic monomer being at least one monomer selected from the group consisting of a compound represented by the following formula (m11), a compound represented by the following formula (m12) and a compound represented by the following formula (m13), and the polymerization inhibitor being a polymerization inhibitor which satisfies the following requirements (a) to (d): (a) it is a 6-membered unsaturated cyclic hydrocarbon having from 1 to 4 substituents, (b) it has, as the substituent, at least one type selected from the group consisting of a t-butyl group, a methyl group, an isopropenyl group, an oxo group and a hydroxy group, (c) in a case where it has an oxo group as one type of the substituent, it has, as the substituent other than the oxo group, either one or both of a t-butyl group and a methyl group, and (d) in a case where it has a hydroxy group as the substituent, the number of the hydroxy group is only one; wherein R 11 , R 12 , R 14 and R 15 are each independently a fluorine atom, a C 1-10 perfluoroalkyl group or a group having an etheric oxygen atom in a carbon-carbon bond of a C 2-10 perfluoroalkyl group, and R 13 is a single bond, a C 1-10 perfluoroalkylene group or a group having an etheric oxygen atom in a carbon-carbon bond of a C 2-10 perfluoroalkylene group. (a) it is a 6-membered unsaturated cyclic hydrocarbon having from 1 to 4 substituents, (b) it has, as the substituent, at least one type selected from the group consisting of a t-butyl group, a methyl group, an isopropenyl group, an oxo group and a hydroxy group, (c) in a case where it has an oxo group as one type of the substituent, it has, as the substituent other than the oxo group, either one or both of a t-butyl group and a methyl group, and (d) in a case where it has a hydroxy group as the substituent, the number of the hydroxy group is only one; <EOS>