Intergenerational solidarity is multidimensional in nature, but the role of filial eldecare norms in structuring intergenerational solidarity is less understood. We examine how filial eldercare norms expressed in early adulthood and midlife are associated with intergenerational solidarity with older parents and how this association varies across parent–child gender combinations. We used data from 1985 to 2005 waves of the Longitudinal Study of Generation when the generation of interest was 32 and 52 years of age, respectively. A three-step latent class approach, culminating with a multinomial logistic regression, was conducted on a sample of 198 mother–son, 279 mother–daughter, 155 father–son, and 209 father–daughter dyads. A tight-knit intergenerational type was uniquely identified in mother–daughter relations, and a social unsupportive type was uniquely identified in father–son and father–daughter relations. Daughters expressing stronger filial norms in early adulthood were more likely in middle adulthood to belong to a tight-knit relational type with mothers and a social unsupportive and intimate but distant relational type with fathers, compared to a detached relational type; these effects were mediated by contemporaneously measured filial norms. Our study complements previous studies on the relationship between filial eldercare norms and intergenerational solidarity with older parents by showing that these norms exert an influence by virtue of being stable in adult daughters over 20 years into middle age. These findings demonstrate that eldercare norms expressed by daughters prior to their parents’ transition to old age structure intergenerational relationships in later life, suggesting that such norms are better considered as long-term endowments than as situational in their origins.