5-Methoxy-3-methyl-6′-nitrospirobenzoselenazolinobenzopyrans have been newly prepared and their reversible structure changes induced by light were characterized by spectroscopic studies. Their stable colored-forms were identified as 5-methoxy-3-methylbenzoselenazolenium-2-trans-(5′-nitrostyryl-2′-oxide) being the zwitterionic structure.