Abstract: A photosensitive resin composition which comprises(1) at least one of the group comprising basic polymeric compounds which have a molecular weight of not less than 1,000, contain basic nitrogen atoms and are themselves poor in hydrophilic properties but, in the presence of an acidic substance, show good hydrophilic properties due to the acid-base interaction, and(2) at least one of the group comprising organic carboxylic acids which are themselves acidic but, when irradiated with light, lose their acidic property due to a chemical conversion.