Craft knife having interchangeable blades

A craft knife comprising:

• a housing having a front open end and a receiving chamber defined in an interior of the housing for receiving multiple blades,
• a controlling piece moveably received in the interior of the housing and extendable out of the housing via the front open end, a receiving recess defined in a side of the controlling piece;
• and
• a resilient member disposed in the interior of the housing to provide resilience pushing the blades such that one of the blades is urged to be received in the receiving recess defined on the controlling piece,
• whereby the controlling piece is able to be slid so that the blade received in the receiving recess is slid out of the housing and detached from the controlling piece, moreover, the controlling piece is able to be slid back into the housing so that another one of the blades in the receiving chamber is able to be pushed into the receiving recess for replacing the detached blade.