PURPOSE: To provide the composition curable by short-time light irradiation and excellent in flexural elastic modulus for cured materials, by composing the composition with the compound having plural addition-polymerizable maleimide groups, addition polymerizable composites and suitable photo-initiator composition.

CONSTITUTION: Photo-curable composition is prepared by mixing a compound containing plurality of addition polymerizable maleimide groups (ex: mixture of Formula I, Y: mixtures of Formula II, Formula III and Formula IV), an addition polymerizable composite (ex: Formula V), and a suitable photo-initiator composition (ex: mixture of camphorquinone, N,N'-dimethylaminoethyl methacrylate and t-butylparabenozoate. This photo-curable composition is ideally used for bonding among ceramics, for bonding sensors with metallic parts of aircraft engine cooling units, and for covering optical fiber joints for ceramics.