The toothpaste extruding toothbrush is a toothbrush assembly having a slotted, hollow, inner volume within the handle covered by a diaphragm which is held in place by a snap on top having a slotted lengthwise opening centered on top that a thumb roller partially extends through which is operated by the thumb of a user to deform the diaphragm to force toothpaste from the inner volume into the extrusion passage and into the bristles.