Provided are a two-photon-absorbing recording medium allowing recording and reproduction of a large volume of information, a two-photon-absorbing recording/reproducing method by using the same, and a two-photon-absorbing recording/reproducing apparatus. The two-photon-absorbing recording medium for recording information by simultaneous two-photon absorption is a medium comprising an alternate laminate structure comprising: a thin-film recording layer of a recording material wherein change in the absorption or emission spectrum thereof is generated by two-photon absorption induced by a light irradiated as recording light; and a thin-film non-recording layer, wherein the recording material forming the recording layer comprising at least one of each of (1) a two-photon-absorbing colorant and (2) a material wherein change in the absorption or emission spectrum thereof is generated in a photochemical reaction caused by an excited state of the two-photon-absorbing colorant generated by two-photon absorption of the two-photon-absorbing colorant.