adjective

not influenced by considerations of personal advantage.

a banker is under an obligation to give disinterested advice

unbiased,unprejudiced,impartial,neutral,non-partisan,non-discriminatory,detached,uninvolved,objective,dispassionate,impersonal,clinical,open-minded,fair,just,equitable,balanced,even-handed,unselfish,selfless,free from discrimination,with no axe to grind,without fear or favour