Abstract: The improved toothbrush has a brush head which may be engaged on to and disengaged from its elongated handle. This is achieve by means of a brush head that has a partially or fully elastic casing disposed on top of the bristle pad. The handle head of the elongated handle is inserted into the casing through its access which is preferably an opening on a second end wall located at the second end of the brush head. The brush head may also include a locking means. Two of the many possible embodiments of the locking means using extended pins and corresponding holes are described herein. The modular brush head and modular handle allows handles with different designs to be fitted with brush head that has different bristle arrays to fit individual brushing needs. The invention is gum friendly and may function as a gum massager and environmental friendly since worn out brush heads are disengaged and thrown away. Such an engageable and disengageable brush head may be incorporated in an electrical toothbrush.