<p>The present invention relates to a UV-A,UV-B discriminating sensor provided with a photochromic compound or photochromic composition as the sensor portion, the photochromic compound or photochromic composition coloring under exposure to UV of wavelength greater than or equal to 280nm or less than or equal to 400nm, and wherein at least a portion of the photochromic layer is covered with a layer containing a pigment which absorbs UV of wavelength less than 320nm, or with a layer containing a pigment which absorbs UV of a wave length greater than or equal to 320nm but less than or equal to or equal to 400nm. <IMAGE></p>
