The ECC affirms the 66-book Protestant biblical canon as the complete and authoritative Word of God. The Old Testament (39 books) and the New Testament (27 books) comprise the full written revelation necessary for faith and practice. The ECC recognizes that this canon was formed through the church's discernment of apostolic and prophetic authority and that the process was guided by the Holy Spirit. However, the canon itself is now closed — no additional books are to be added.

The ECC regards Scripture as the primary and ultimate authority for Christian faith, doctrine, and practice. While the ECC values tradition, reason, and experience, Scripture is supreme. When tradition, cultural preferences, or other authorities conflict with biblical teaching, Scripture prevails. The deuterocanonical books (Apocrypha) accepted by Roman Catholic and Orthodox churches are not considered canonical by the ECC, though they may be read for historical or devotional value.

The ECC Affirmations state that Scripture is 'the authoritative Word of God,' emphasizing both its divine origin and its binding authority for the church. Individual believers and congregations are encouraged to read, study, and interpret Scripture thoughtfully, seeking the Holy Spirit's guidance. The church's role is to help believers understand Scripture rightly and to hold one another accountable to biblical truth.