The Office of the Comptroller General of the Defence (Spanish: Intervención General de la Defensa) is a department of the Ministry of Defence of Spain that exercises the internal audit of the economic and financial management of the Ministry and of the public agencies dependent on it.

Likewise, it is responsible for acting as the military notary in the form and conditions established by the laws and for advising in matters of its competence to the superior and directive departments of the Ministry.

[1] The Office of the Comptroller General is integrated by staff from the Military Audit Corps and it is headed by the Comptroller General of the Defence, who is the official responsible for issuing the necessary instructions to ensure proper coordination and unity of judgment.

For much of Spain's military history, the different branches of the Armed Forces were managed by various government departments.

The Comptroller General has a secretariat as a direct support body, which is responsible for the registration and administrative management of the files and reports that are processed in the IGD; the computer coordination of the IGD; and the functions regarding the military notary.