PROBLEM TO BE SOLVED: To provide a handle of a portable oral care tool that enables extension of the handle for being attached to a toothbrush and a sponge brush.SOLUTION: A portable oral care tool according to the present invention includes: a brush part, the tip of which is made of a toothbrush or a sponge brush a ball that is attached to the brush part and that houses a care agent a first handle that is connected to the brush part and that has an engagement protrusion and a second handle that makes the first handle slidably housed in a storage hole and that has an inner periphery of the storage hole provided with an engagement recess for being engaged with the engagement protrusion.SELECTED DRAWING: Figure 1