To provide a helmet with a penlight capable of freely detachably attaching the penlight to the helmet and freely changing the illumination angle of the penlight in an attached state of the penlight, and also provide a jig for attaching the penlight to the helmet.

This helmet 20 with a penlight 13 is obtained by attaching a jig for attaching the penlight 13 to the helmet 20 comprising a fixing member having an engaging part 3 for the helmet 20 and a rising plate rising nearly parallel to the outer lateral face of the helmet 20, a connecting member comprising a bent plate bent into an L-shaped cross section and having one surface sandwiching the bent part and rotatably attached to the rising plate and a binding band 9 rotatably attached to the other surface sandwiching the bent part of the connecting member and capable of holding the penlight 13 to the lateral edge of the helmet 20.