Deputy minister is a title borne by politicians or officials in certain countries governed under a parliamentary system. In some countries a "Deputy minister" is a junior minister, who is assigned to assist a specific cabinet minister.
Bangladesh: A Deputy minister is junior to a Minister of a Department of State (portfolio minister) and of similar standing to a Parliamentary Secretary.
Canada: The Deputy minister is the senior civil servant in a government department. He or she takes political direction from an appointed minister of the Crown.
Tanzania: The Deputy ministers are junior ministers, and are usually not members of the government's cabinet
