Abstract: Provided is a photosensitive composition, which comprises a carboxyl group-containing resin, a photopolymerization initiator, a photosensitive acrylate compound and a filler, wherein the filler has a refractive index of 1.5 to 1.6 and a dry coating film of the photosensitive composition shows an absorbance of at least either 0.01 to 0.2 at a wavelength of 365 nm or 0.01 to 0.2 at a wavelength of 405 nm per thickness of 25 ?m. The content of the filler is preferably 20 to 60 wt % with respect to the total amount of the composition. This photosensitive composition can be advantageously used as a plating resist of a printed wiring board or a solder resist and is useful particularly in the formation of a very finely patterned resist film having a high aspect ratio.