NOVELTY - An ethylene compound (1) having absorption maximum in visible region, is new.    USE - For photosensitizer in semiconductor electrode, for optoelectric transducer and solar cell (all claimed), for garments, lace, casement, print, Venetian blind, roll screen, shutter, vehicle interior material such as floor seat cushion, shop curtain, blanket, bedding, bedding cover, bedding cotton, sheet, mat, carpet, sleeping bag, tent, window glass, paper diaper, diaper cover, spectacles, shoe insole, shoe lining, bag material, Japanese wrapping cloth, umbrella cloth, parasol, stuffed toy, optical displays such as illumination device, television receiver, cathode ray tube display, liquid crystal display, electroluminescent display, plasma display and personal computer, panel and screens, sun glass, sun roof, sun visor, polyethylene terephthalate bottle, cheese cloth, optical fiber, prepaid card, microwave oven, viewing window, packaging, dyeing, and for irradiation of polymerizable compound.    ADVANTAGE - The ethylene compound has stable optical absorption property even when absorbed in semiconductor layer.    DETAILED DESCRIPTION - An ethylene compound of formula (1) having absorption maximum in visible region, is new.    R1 = visible light optionally absorbing group;    R2 = optionally substituted hydrocarbon group; and    R3 = group having atom with lone pair.    INDEPENDENT CLAIMS are included for the following:    (i) photosensitizer comprising ethylene compound;    (ii) manufacturing method of ethylene compound, which involves reacting methylene group compound of formula (5) and an aldehyde compound of formula (6);    (iii) semiconductor electrode (1) sensitized by ethylene compound;    (iv) optoelectric transducer using the ethylene compound; and    (v) solar cell using the ethylene compound.    R1-CH2-R2 (5)    R3-CHO (6)    R1-R3 = as defined in formula (1).    DESCRIPTION OF DRAWING(S) - The figure shows the model of optoelectric transducer containing ethylene compound. (Drawing includes non-English language text).    semiconductor electrode (1)