PURPOSE: To provide a developer of high preservability.

CONSTITUTION: A developer contains a compound expressed by a formula, and exposed silver halide photo graphic material is processed using this developer. In the formula, R1, R2 respectively represent hydroxy group, amino groups, acylamino groups, alkylsulfonylamino groups, arylsulfonylamino groups, alkoxycarbonylamino groups or mercapto groups. X is formed of a carbon atom, a nitrogen atom or an oxygen atom, and X forms a 7-8 member ring in conjunction with two vinyl carbon and carbonyl carbon substituted by R1, R2.