A mop with interchangeable head mechanism is an apparatus that facilitates the use of multiple mop heads with a single handlebar. The apparatus includes a handle shaft, an adapter neck, a retention bracket, at least one interchangeable head assembly, a first attachment mechanism, and a second attachment mechanism. The handle shaft allows a user to easily maneuver the at least one interchangeable head assembly from a distance. The adapter neck connects the retention bracket and the at least one interchangeable head assembly with the handle shaft. The retention bracket connects the at least one interchangeable head assembly with the adapter neck. The at least one interchangeable head assembly serves as the mop head. The first attachment mechanism locks and unlocks the handle shaft with the adapter neck. The second attachment mechanism locks and unlocks the at least one interchangeable head assembly with the retention bracket.