The Ministry of Defence (MINISDEF) is the department of the Government of Spain responsible for planning, developing and carrying out the general guidelines of the Government about the defence policy and the managing of the military administration. It is the administrative and executive body of the Spanish Armed Forces.

The Spanish government departments, commonly known as Ministries, are the main bodies through which the Government of Spain exercise its executive authority. They are also the top level of the General State Administration. The ministerial departments and their organization are created by Royal Decree signed by the Monarch and the Prime Minister and all of them are headed by a Cabinet member called Minister.