The present invention addresses the problem of providing a fiber for protein adsorption and a column for protein adsorption which have minimal eluates are safe and have high protein adsorption performance. The present invention involves a fiber for protein adsorption and a column for protein adsorption. Said fiber has a water absorption rate of 1 to 50% and contains a polymer comprising repeating units of aromatic hydrocarbons or derivatives thereof wherein some of the aromatic rings of the repeating units are crosslinked via the structure represented by general formula (I). A in the general formula is selected from an aliphatic alkyl group an aromatic phenyl group and an amino group.
