A heat-sensitive recording material comprising: a heat-sensitive recording layer containing a basic dye which is colorless or light-colored at room temperature and a developer capable of expressing a color through contact with the dye by heating and provided on a supporting body, wherein the developer is at least one type of an N-substituted amino acid derivative in which a raw material thereof is a natural amino acid, the N-substituted amino acid derivative being represented by the following General Formula : (R-X) m -Y-(Z) m ... in Formula , R represents an alkyl group having a substituent of an aryl group having 6 to 10 carbon atoms, or an aryl group which may have a substituent of an alkyl group having 1 to 8 carbon atoms, an aralkyl group having 7 to 11 carbon atoms, an aryl group having 6 to 10 carbon atoms, or an alkoxy group having 1 to 8 carbon atoms, X is a group bonded to an N-terminus of Y and represents -OCO-, -SO 2 NHCO-, -NHCO-, or -NHCS-, Y represents an amino acid residue or a peptide residue and an OH group of a serine residue, a threonine residue, an aspartic acid residue, a glutamic acid residue, or a tyrosine residue in the Y group may be substituted with an OR group or an OR" group, an SH group of a cysteine residue may be substituted with an SR group or an SR" group, an NH group of a histidine residue may be substituted with an NR group or an NR' group, an NH 2 group of a lysine residue or an ornithine residue may be substituted with an NHR group or an NHR' group, R' represents an amino protecting group, and R" represents a carboxy protecting group, Z is a group bonded to a C-terminus of Y and represents an OH group or an OR" group, and a plurality of R, R', and R" groups may be the same as or different from each other and may be bonded to each other to form a ring, with the proviso that Y is an amino acid residue other than a cystine residue or a peptide residue not having a cystine residue, and m = 1. a heat-sensitive recording layer containing a basic dye which is colorless or light-colored at room temperature and a developer capable of expressing a color through contact with the dye by heating and provided on a supporting body, wherein the developer is at least one type of an N-substituted amino acid derivative in which a raw material thereof is a natural amino acid, the N-substituted amino acid derivative being represented by the following General Formula : (R-X) m -Y-(Z) m ... in Formula , R represents an alkyl group having a substituent of an aryl group having 6 to 10 carbon atoms, or an aryl group which may have a substituent of an alkyl group having 1 to 8 carbon atoms, an aralkyl group having 7 to 11 carbon atoms, an aryl group having 6 to 10 carbon atoms, or an alkoxy group having 1 to 8 carbon atoms, X is a group bonded to an N-terminus of Y and represents -OCO-, -SO 2 NHCO-, -NHCO-, or -NHCS-, Y represents an amino acid residue or a peptide residue and an OH group of a serine residue, a threonine residue, an aspartic acid residue, a glutamic acid residue, or a tyrosine residue in the Y group may be substituted with an OR group or an OR" group, an SH group of a cysteine residue may be substituted with an SR group or an SR" group, an NH group of a histidine residue may be substituted with an NR group or an NR' group, an NH 2 group of a lysine residue or an ornithine residue may be substituted with an NHR group or an NHR' group, R' represents an amino protecting group, and R" represents a carboxy protecting group, Z is a group bonded to a C-terminus of Y and represents an OH group or an OR" group, and a plurality of R, R', and R" groups may be the same as or different from each other and may be bonded to each other to form a ring, with the proviso that Y is an amino acid residue other than a cystine residue or a peptide residue not having a cystine residue, and m = 1. <EOS>