Patent ID: 8232344

Claim:
A target substance-detecting element comprising: a substrate having a detection area; a membrane, present at least on the surface of the detection area, having a polymer of a monomer represented by the following General Formula (1) or the following General Formula (2); and a first target substance-capturing molecule bonded to the polymer: wherein R represents H or CH 3 ; and x represents an integer of 2 or more and 5 or less, and y represents an integer of 1 or more and 7 or less, with the proviso that x+y=an integer of 3 or more and 10 or less; and wherein R 1 ═H or CH 3 , and R 2 represents O or NH; and a represents an integer of 2 or more and 5 or less, and b represents an integer of 1 or more and 7 or less, with the proviso that a+b=an integer of 3 or more and 10 or less.