The investigation includes the effect of freezing and thawing cycles on stress-strain relationships of polymer modified concrete (PMC). Cycles of freezing and thawing contains 12 hours at 100°C and 12 hours at -4°C. The process of cycles of freezing and thawing Simple experimental technique is used to obtain the complete stress-strain curves up to strain of 0.006 (Both ascending and descending portions) sample subjected to freezing and thawing cycles (FTC), then subjected also to stress-strain tests.