To hinder the moving of a sheet caused by the movement during the sleeping, which requires frequent sheet making.

In the sheet for beds which provides a first surface roughly square in shape contacting a mattress and a band-like surface which is extended like a skirt from the outer circumference of the first surface covering four sides of the bed, a second surface roughly square is provided as formed covering the top surface of the first surface and a bag-like space is let a bed pad be sandwiched between the first and second surfaces while an opening part is inserted a side of the first or second surface or a part of the surface into the bag-like space.