The present invention relates to a novel (meth)acrylamide compound represented by the general formula (1), a (co)polymer of the (meth)acrylamide compound, and a chemically amplified photosensitive resin composition composed of the polymer and a photoacid generator. In the formula, R
1
represents a hydrogen atom or a methyl group; R
2
represents an acid-decomposable group; and R
3
to R
6
independently represent a hydrogen atom, a halogen atom or an alkyl group having 1 to 4 carbon atoms.