[Problem] To provide a writing instrument which is provided with a plurality of writing bodies, and which is capable of delivering a writing core from a rear end of one of the writing bodies. [Solution] A writing instrument according to one embodiment is provided with a plurality of writing bodies, and is capable of selecting one of the plurality of writing bodies and making said writing body protrude from an opening at the tip. The writing instrument is further provided with a holder which holds one of the plurality of writing bodies such that a rear end opening of said one writing body is disposed on an axial line.