A dental composition comprising: (a) a radically polymerizable compound of the following formula (I), or a salt thereof: wherein one of R 1 and R 2 represents a group of the following formula (II) or (III), and the other of R 1 and R 2 , which may be the same or different, independently represents a hydrogen atom or a group of formula (II) or (III): wherein R 3 is a hydrogen atom or a methyl group; R 4 is a C 1-6 alkyl group, C 3 - 6 cycloalkyl group or a C 2 - 6 alkenyl group; n represents an integer of from 0 to 14; m represents an integer of from 1 to 14; and R A and R B each represent a hydrogen atom so that a methylene group or an m- or n-membered polymethylene chain is present, or R A and R B , which may be the same or different, independently represent a hydrogen or a fluorine atom so that a fluorine substituted methylene group or a fluorine substituted m- or n-membered polymethylene chain is present, and (b) a radical initiator system. (a) a radically polymerizable compound of the following formula (I), or a salt thereof: wherein one of R 1 and R 2 represents a group of the following formula (II) or (III), and the other of R 1 and R 2 , which may be the same or different, independently represents a hydrogen atom or a group of formula (II) or (III): wherein R 3 is a hydrogen atom or a methyl group; R 4 is a C 1-6 alkyl group, C 3 - 6 cycloalkyl group or a C 2 - 6 alkenyl group; n represents an integer of from 0 to 14; m represents an integer of from 1 to 14; and R A and R B each represent a hydrogen atom so that a methylene group or an m- or n-membered polymethylene chain is present, or R A and R B , which may be the same or different, independently represent a hydrogen or a fluorine atom so that a fluorine substituted methylene group or a fluorine substituted m- or n-membered polymethylene chain is present, and one of R 1 and R 2 represents a group of the following formula (II) or (III), and the other of R 1 and R 2 , which may be the same or different, independently represents a hydrogen atom or a group of formula (II) or (III): wherein R 3 is a hydrogen atom or a methyl group; R 4 is a C 1-6 alkyl group, C 3 - 6 cycloalkyl group or a C 2 - 6 alkenyl group; n represents an integer of from 0 to 14; m represents an integer of from 1 to 14; and R A and R B each represent a hydrogen atom so that a methylene group or an m- or n-membered polymethylene chain is present, or R A and R B , which may be the same or different, independently represent a hydrogen or a fluorine atom so that a fluorine substituted methylene group or a fluorine substituted m- or n-membered polymethylene chain is present, and R 3 is a hydrogen atom or a methyl group; R 4 is a C 1-6 alkyl group, C 3 - 6 cycloalkyl group or a C 2 - 6 alkenyl group; n represents an integer of from 0 to 14; m represents an integer of from 1 to 14; and R A and R B each represent a hydrogen atom so that a methylene group or an m- or n-membered polymethylene chain is present, or R A and R B , which may be the same or different, independently represent a hydrogen or a fluorine atom so that a fluorine substituted methylene group or a fluorine substituted m- or n-membered polymethylene chain is present, and (b) a radical initiator system. <EOS>