A method for producing an amide compound, comprising a step of forming an amide bond between a carboxyl group on the right side of general formula of a compound represented by general formula and an amino group on the left side of general formula of a compound represented by general formula in the presence of a Lewis acid catalyst and a silylating agent to synthesize a compound represented by general formula, wherein, in general formulas,, and, R 1, R 2, R 4, and R 5 each independently represent a hydrogen atom, halogen atom, hydroxy group, carboxyl group, nitro group, cyano group, or thiol group, or a monovalent hydrocarbon group or heterocyclic group, which may have one, two, or more substituents, where the monovalent hydrocarbon group or heterocyclic group may be bonded to a nitrogen atom via a linker group; R 3 and R 6 each independently represent a hydrogen atom, carboxyl group, or hydroxy group, or a monovalent hydrocarbon group or heterocyclic group, which may have one, two, or more substituents, where the monovalent hydrocarbon group or heterocyclic group may be bonded to a carbon atom via a linker group; R 1 and R 3 may be bonded together to form, together with a carbon atom to which R 1 bonds and a nitrogen atom to which R 3 bonds, a heterocycle which may have one, two, or more substituents, or R 4 and R 6 may be bonded together to form, together with a carbon atom to which R 4 bonds and a nitrogen atom to which R 6 bonds, a heterocycle which may have one, two, or more substituents; A 1 to A 4 each independently represent a divalent aliphatic hydrocarbon group having 1 to 3 carbon atoms, which may have one, two, or more substituents; p1 to p4 each independently represent 0 or 1; m and n are each independently an integer of 1 or higher and represent the number of constitutional units represented by a structure in []; PG 1 represents a protecting group of an amino group; PG 2 represents a protecting group of a carboxyl group; and an amino group on the left side of general formula may form a salt with an acid. R 1, R 2, R 4, and R 5 each independently represent a hydrogen atom, halogen atom, hydroxy group, carboxyl group, nitro group, cyano group, or thiol group, or a monovalent hydrocarbon group or heterocyclic group, which may have one, two, or more substituents, where the monovalent hydrocarbon group or heterocyclic group may be bonded to a nitrogen atom via a linker group; R 3 and R 6 each independently represent a hydrogen atom, carboxyl group, or hydroxy group, or a monovalent hydrocarbon group or heterocyclic group, which may have one, two, or more substituents, where the monovalent hydrocarbon group or heterocyclic group may be bonded to a carbon atom via a linker group; R 1 and R 3 may be bonded together to form, together with a carbon atom to which R 1 bonds and a nitrogen atom to which R 3 bonds, a heterocycle which may have one, two, or more substituents, or R 4 and R 6 may be bonded together to form, together with a carbon atom to which R 4 bonds and a nitrogen atom to which R 6 bonds, a heterocycle which may have one, two, or more substituents; A 1 to A 4 each independently represent a divalent aliphatic hydrocarbon group having 1 to 3 carbon atoms, which may have one, two, or more substituents; p1 to p4 each independently represent 0 or 1; m and n are each independently an integer of 1 or higher and represent the number of constitutional units represented by a structure in []; PG 1 represents a protecting group of an amino group; PG 2 represents a protecting group of a carboxyl group; and an amino group on the left side of general formula may form a salt with an acid.