Family quality of life (FQoL) is considered one of the aims of early intervention (EI) services and a good indicator of service quality. Families were recruited from EI centers in 12 of 17 communities (states) in Spain. This study describes the FQoL of 250 Spanish families with children aged 0 to 6 years in EI services during a family-centered implementation process. We used an EI-specific FQoL scale that includes families' perception of their child's functioning as one factor. We also describe the relationships among individual, family, and service variables as well as FQoL. Type of disability, socioeconomic status, and family-centered practices impacted Child Functioning, Overall Life Situation, and Access to Information and Services factors, respectively. Fewer number of professionals involved was related with greater perception of child's functionality. Family-centeredness, type of family, and type of disability were the most influencing variables for the Total score. Implications for practice are discussed.