A method for manufacturing a polymer compound which has a constituent unit (a10) which includes a hydroxy group and a constituent unit (a1) which includes an acid decomposable group of which a polarity increases due to an effect of an acid, the method including copolymerizing a monomer for deriving a constituent unit (a0) which includes a group which protects a phenolic hydroxyl group or a hydroxy group of a carboxy group with an organic silicon compound and a monomer for deriving the constituent unit (a1) and obtaining a prepolymer which has the constituent unit (a0) and the constituent unit (a1), and selectively deprotecting the constituent unit (a0) by reacting a compound which has a fluoride anion with the prepolymer and obtaining a polymer compound which has the constituent unit (a10) and the constituent unit (a1).