The existence and temperature stability of the hydrogen bond system in triblock copolymers based on chemically complementary polyacrylamide and poly(ethylene oxide) are studied. The participation of the trans-multimers of PAA amide groups and oxygen atoms of PEO in the formation of hydrogen bonds between both polymer blocks is established. It is shown that the hydrogen bond system in the copolymers is stable enough in the wide temperature region T = (308 divided by 473) K. The insignificant destruction of the H-bonds between PAA and PEO blocks and also the cis-traps- and traps-multimers of amide groups in the triblock copolymers is revealed at the temperature increasing.