Three infants were observed for seven months during their preverbal period, and their developmental changes in form of communicative expression in a demanding situation were analyzed. They integrated their behavioral use of demanding an object, looking at a person and simultaneously vocalizing as soon as or shortly after they acquired the ability to the use of “pointing”. In consequence, the observation suggested that acquisition of “pointing” in a preverbal period coincided with the establishment of a developmental basis in intentional operation of multiple sensory modalities.