A gallium phthalocyanine compound represented by the following chemical structure I, where X represents a substituted or non-substituted alkyl group, a substituted or non-substituted alkenyl group, a substituted or non-substituted alkynyl group, a substituted or non-substituted aralkyl group, a substituted or non-substituted cycloalkyl group, a substituted or non-substituted aryl group, or a hydrogen atom, where substitution groups thereof are an alkoxy group, an alkylthio group, an alkyl group, a halogen atom, nitro group, amino group, an aryl group, carboxylic group, and cyano group, R1 to R16 independently represent a hydrogen atom, an alkoxy group, an alkylthio group, an alkyl group, a halogen atom, nitro group, or aryl group, n represents an integer of from 1 to 3 but excluding a combination in which n is 1 and X is methyl group.