[Problem] To provide a photosensitive resin composition which exhibits excellent relief image reproducibility and improved toughness and printing durability, and a photosensitive resin printing plate precursor. [Solution] A photosensitive resin composition which is characterized by containing (A) a modified and partially saponified poly(vinyl acetate) having a reactive group in a side chain, (B) a polyamide having a basic nitrogen atom, (C) a compound having a molecular weight of 300 or lower, a 5-7 membered ring and a polymerizable ethylenic double bond, and (D) a photopolymerization initiator.