A porphyrin array exhibiting a large two-photon absorption property, and being linked with an acetylenic bond(s), represented by the following formulas: wherein R1 represents an alkyl or aryl group, M1 represents a metal ion capable of serving as a core metal and forming a coordinate bond with Im, M2 represents two protons or a metal ion incapable of forming a coordinate bond with Im, R2 and R3 represent a group selected from a porphyrin residue or porphyrin metal complex residue, a cyclic diimide residue, a dialkylviologen residue, a benzoquinone residue, an N-methylpyrrolidine-fullerene derivative residue and a ferrocene residue, Im is represented by Im1 or Im2: (R8 represents methyl or H), L1 represents —(—C≡C—)m— (m=1 to 3); n represents an integer of 1 or more; R9 represents one of R1, R2, R3 and Im.