We have synthesized polymethacrylamide derivative with a triphenylamine moiety in the side chain, and then examined the feasibility of its application as a polymer hole transport material. Thermal and optoelectrical characteristics of the polymer were investigated by TGA, DSC, cyclic voltammetry, and photoluminescence measurements. Organic electroluminescent devices consisting of ITO/ hole transport material, polymethacrylamide derivative/ luminescent material, Alq/MgAg were constructed using multilayer organic thin films. The redox potential of the polymer has a low value of 0.94V, which represented the high durability and low drive voltage of the device owing to the small energy barrier for hole injection. Green emission with a luminance of 150 cd/cm² was achieved at a dc drive voltage of 15V.