a novel aromatic diamino amide monomer of the structural formula , a novel aromatic polyamide of the structural formula prepared by polycondensation of the monomer and an aromatic diacid halide , and an aromatic polyamide film produced from the polyamide which has high strength as well as high modulusity . ## str1 ## wherein , each of two nh 2 groups may be in meta or para - position to the amide bond . ## str2 ## wherein , ar represents a phenyl group , x represents conh 2 group in ortho - position to the amide bond , y represents h , cl , br , i , no 2 or an alkyl or alkoxy group having 1 to 4 carbon atom , and n represents an integer between 10 and 100 , 000 .