To provide a shutter capable of improving fireproof performance while eliminating the changing of a component and a structure of a lock mechanism to the utmost, and a sash with the shutter.

A frame body 1 configured by framing a head 10, a sill 11, and right and left jambs 12 and 12 is provided, and the head 10 has a storage portion 2 that supports a door body 3 and that can freely house the door body by rolling it up. The door body 3 has a baseboard member 31 provided at a lower end, and the baseboard member 31 has a space portion 31c in which a lock mechanism 32 is arranged. A heated and foamed material 34 is provided in such a manner as to face the space portion 31c, and the space portion 31c is formed by being surrounded by an outdoor side wall 31a of the baseboard member 31 and a lock cover material 33 attached to the baseboard member 31 from an indoor side. The heated and foamed material 34 is provided on the outdoor side wall 31a of the baseboard member 31.