To provide a shaking-out type mechanical pencil without a risk of detaching a mechanism part from a shaft cylinder 7 even if knocking on a knob 18 accidentally in the removed state of a mouthpiece 9 from the shaft cylinder 7.

The mechanism part is inserted from the front part of the shaft cylinder 7, and an inner collar 7A of the shaft cylinder 7 is locked by an outer collar 5A and a projecting part 5D of a connecting implement 5 of the mechanism part. Further, a clearance S3 between the connecting implement 5 and a connector 2 is set longer than a distance obtained by subtracting a clearance S2 between a pressing member 16 and a lead tank 3 from a clearance S1 between a head crown 13 and the pressing member 16.