This study describes the current status of digital textbooks (DTBs) for Primary Education in Spain. Thirty digital teaching materials were analyzed. The method applied was content analysis. An analysis guide aimed at unraveling the technological, pedagogical and functional characteristics of this type of materials was designed, validated and applied. We found simple digitization of printed textbooks enriched with some multimedia resources perpetuating the deficiencies of these resources. The DTBs currently present in the Spanish publishing market are a response of this sector to the existing demand due to the evolution of the digital educational market. The novelty of this study lies in providing the first guide that analyzes these materials considering all their defining characteristics.