OPTICAL DETECTION CHIP AND OPTICAL DETECTION SYSTEM

Provided is an optical detection chip that makes it possible to measure accurately, in a short time, hydrogen sulfide and methyl mercaptan contained in a gas subject to detection. An optical detection chip 14 is provided with: an optically transparent substrate 2; and a layer structure 1 provided with a dye layer 3 that is formed on the optically transparent substrate 2, that includes organic dye molecules 31 containing amino groups, ketone groups, or quinones, as well as metal ions 32 of at least one kind selected from the group consisting of Mn, Fe, Co, Ni, Cu, Zn, Cd, Hg, Ag, Pb, and Tl, and that exhibits a color change in response to a gas subject to detection including at least one of hydrogen sulfide and methyl mercaptan.