The present invention biological material such as proteins, there is provided a composition for forming a coating film having adhesion inhibitory effects of cells such as platelets. A The following formula (1): [Formula 1] Wherein, R 1 represents an aromatic hydrocarbon or an alicyclic hydrocarbon with one or two containing organic group having a carbon number of 4 to 20, two n 5 or are each an integer of 600, Q following formula (2), Equation (3), equation (4) or the formula (5): ## STR2 ## (Wherein, Q 1 represents a divalent organic group, two m is 0 or 1 independently.) ## STR3 ## (Wherein, in each of R 2, R 3, R 4 and R 5 independently represent a hydrogen atom or an organic group.) In I represents a divalent organic group represented. ] Adhesion inhibitor of biological materials or cells comprising a polymer, a crosslinking material and an organic solvent having a structural unit represented in. .BACKGROUND【課題】 タンパク質などの生体物質、血小板などの細胞の付着抑制効果を有する被覆膜を形成するための組成物を提供する。【解決手段】下記式(1):【化1】〔式中、R1は芳香族炭化水素又は脂環式炭化水素を1つ又は2つ含む炭素原子数4乃至20の有機基を表し、2つのnはそれぞれ5乃至600の整数を表し、Qは下記式(2)、式(3)、式(4)又は式(5):【化2】(式中、Q1は二価の有機基を表し、2つのmはそれぞれ独立に0又は1を表す。)【化3】(式中、R2、R3、R4及びR5はそれぞれ独立に、水素原子又は有機基を表す。)で表される二価の有機基を表す。〕で表される構造単位を有するポリマー、架橋材及び有機溶媒を含む生体物質又は細胞の付着抑制剤。【選択図】なし
