In this study, Spanish mothers and fathers (N = 108) estimated their own general and multiple intelligences, as well as those of their children and of their own parents. The mothers' self-estimates of their verbal, logical-mathematical, spatial, and corporal intelligence were lower than the fathers'. The mothers made lower estimates of their daughters' spatial intelligence than of their sons'. Both parents made lower estimates of the verbal, logical-mathematical, and spatial intelligence of the grandmothers than of the grandfathers. Children and parents were both more intelligent than the grandparents. The results are in line with the research of many other studies that confirm the gender effect and the generational effect. (Contains 1 figure and 6 tables.)