The home learning environment (HLE) index is composed of seven questions regarding educational parent-child interactions. To compare the psychometric characteristics of the six items of HLE index between the two different contexts of Germany and Iran, a sample including 468 preschool children from the National Educational Panel Study (NEPS), Germany, and 465 preschool children from the Longitudinal Study of Iranian Children (LSIC; Growing Up in Iran) were examined. Rasch analysis supports the fitness of the five items of HLE into the model in both countries. However, differential item functioning (DIF) results revealed significant differences between items functioning across the two samples. According to the item difficulty maps, reading to children was the most reported item in the German families, while Iranian parents tended to paint and draw with their children more. While findings support the construct validity and reliability of five of the six items in both samples, different Rasch results may reveal the effects of the cultural dimensions of each country on HLE items.