A method for producing a peptide, comprising the steps of: removing the N-terminal protective group of an amino acid or peptide compound represented by the following formula: wherein Y represents a residue of an N-protected amino acid or an N-protected peptide, and each of R 1, R 2, and R 3 independently represents an aliphatic hydrocarbon group which may have a substituent in which each of 1 to 5 methylene groups in the aliphatic hydrocarbon group may be independently replaced by a structure selected from the group consisting of -O-, -CO-, -N(R 6)-, -N(R 7)CO-, and -CON(R 8)- or an aromatic hydrocarbon group which may have a substituent, wherein each of R 6, R 7, and R 8 independently represents a hydrogen atom or a C 1-6 alkyl group, wherein the total number of carbon atoms in the R 1 R 2 R 3 Si group is 18 to 80, and the R 1 R 2 R 3 SiCH 2 CH 2 group is bonded to the C-terminus of the amino acid or peptide residue in Y; and causing condensation of an N-protected amino acid or an N-protected peptide and the N-terminus of the C-protected amino acid or C-protected peptide obtained in the step; or a method for producing a peptide, comprising the steps of: removing the N-terminal protective group of an amino acid or peptide compound represented by the following formula: wherein Y represents a residue of an N-protected amino acid or an N- protected peptide, and each of R 1, R 2, and R 3 independently represents an aliphatic hydrocarbon group which may have a substituent in which each of 1 to 5 methylene groups in the aliphatic hydrocarbon group may be independently replaced by a structure selected from the group consisting of -O-, -CO-, -N(R 6)-, -N(R 7)CO-, and -CON(R 8)-, wherein each of R 6, R 7, and R 8 independently represents a hydrogen atom or a C 1-6 alkyl group, wherein the total number of carbon atoms in the R 1 R 2 R 3 Si group is 18 to 80, and the R 1 R 2 R 3 SiCH 2 CH 2 group is bonded to the C-terminus of the amino acid or peptide residue in Y; and causing condensation of an N-protected amino acid or an N-protected peptide and the N-terminus of the C-protected amino acid or C-protected peptide obtained in the step. removing the N-terminal protective group of an amino acid or peptide compound represented by the following formula: wherein Y represents a residue of an N-protected amino acid or an N-protected peptide, and each of R 1, R 2, and R 3 independently represents an aliphatic hydrocarbon group which may have a substituent in which each of 1 to 5 methylene groups in the aliphatic hydrocarbon group may be independently replaced by a structure selected from the group consisting of -O-, -CO-, -N(R 6)-, -N(R 7)CO-, and -CON(R 8)- or an aromatic hydrocarbon group which may have a substituent, wherein each of R 6, R 7, and R 8 independently represents a hydrogen atom or a C 1-6 alkyl group, wherein the total number of carbon atoms in the R 1 R 2 R 3 Si group is 18 to 80, and the R 1 R 2 R 3 SiCH 2 CH 2 group is bonded to the C-terminus of the amino acid or peptide residue in Y; and wherein Y represents a residue of an N-protected amino acid or an N-protected peptide, and each of R 1, R 2, and R 3 independently represents an aliphatic hydrocarbon group which may have a substituent in which each of 1 to 5 methylene groups in the aliphatic hydrocarbon group may be independently replaced by a structure selected from the group consisting of -O-, -CO-, -N(R 6)-, -N(R 7)CO-, and -CON(R 8)- or an aromatic hydrocarbon group which may have a substituent, wherein each of R 6, R 7, and R 8 independently represents a hydrogen atom or a C 1-6 alkyl group, wherein the total number of carbon atoms in the R 1 R 2 R 3 Si group is 18 to 80, and the R 1 R 2 R 3 SiCH 2 CH 2 group is bonded to the C-terminus of the amino acid or peptide residue in Y; causing condensation of an N-protected amino acid or an N-protected peptide and the N-terminus of the C-protected amino acid or C-protected peptide obtained in the step; or removing the N-terminal protective group of an amino acid or peptide compound represented by the following formula: wherein Y represents a residue of an N-protected amino acid or an N- protected peptide, and each of R 1, R 2, and R 3 independently represents an aliphatic hydrocarbon group which may have a substituent in which each of 1 to 5 methylene groups in the aliphatic hydrocarbon group may be independently replaced by a structure selected from the group consisting of -O-, -CO-, -N(R 6)-, -N(R 7)CO-, and -CON(R 8)-, wherein each of R 6, R 7, and R 8 independently represents a hydrogen atom or a C 1-6 alkyl group, wherein the total number of carbon atoms in the R 1 R 2 R 3 Si group is 18 to 80, and the R 1 R 2 R 3 SiCH 2 CH 2 group is bonded to the C-terminus of the amino acid or peptide residue in Y; and wherein Y represents a residue of an N-protected amino acid or an N- protected peptide, and each of R 1, R 2, and R 3 independently represents an aliphatic hydrocarbon group which may have a substituent in which each of 1 to 5 methylene groups in the aliphatic hydrocarbon group may be independently replaced by a structure selected from the group consisting of -O-, -CO-, -N(R 6)-, -N(R 7)CO-, and -CON(R 8)-, wherein each of R 6, R 7, and R 8 independently represents a hydrogen atom or a C 1-6 alkyl group, wherein the total number of carbon atoms in the R 1 R 2 R 3 Si group is 18 to 80, and the R 1 R 2 R 3 SiCH 2 CH 2 group is bonded to the C-terminus of the amino acid or peptide residue in Y; causing condensation of an N-protected amino acid or an N-protected peptide and the N-terminus of the C-protected amino acid or C-protected peptide obtained in the step.