A silver halide photographic emulsion containing, in supersensitizing amounts, at least one sensitizing dye represented by the following general formula (I) ##EQU1## wherein Z.sub.11 represents the atoms necessary to complete a thiazole nucleus, a selenazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a naphthothiazole nucleus or a naphthoselenazole nucleus; Z.sub.12 represents the atoms necessary to complete a naphthothiazole nucleus, or a naphthoselenazole nucleus; and R.sub.11 and R.sub.12 each represents an aliphatic group with at least one of R.sub.11 and R.sub.12 having a carboxy or sulfo group; and at least one sensitizing dye represented by the following general formula (II) ##EQU2## wherein Z.sub.21 represents the atoms necessary to complete a thiazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, a selenazole nucleus, a benzoselenazole nucleus or a naphthoselenazole nucleus; Z.sub.22 represents the atoms necessary to complete an imidazole nucleus, a benzimidazole nucleus or a naphthoimidazole nucleus; and R.sub.21 and R.sub.22 each represents an aliphatic group with at least one of R.sub.21 and R.sub.22 having a carboxy or sulfo group.