Abstract: A microdrape 10 covers a surgical microscope system 60 including a surgical microscope 61 and a pair of binoculars 62 independently supported by an arm structure 64. The microdrape 10 has an opening end 6 and a closed end opposite to the opening end 6. The microdrape 10 includes: a cylindrical bag shaped main body 10a having the opening end 6; a first cylindrical bag 1 connected to the main body, 10a wherein the first cylindrical bag 1 has a hood for covering a lens tube of an objective lens 61a of the surgical microscope 61 and projecting portions 9a, 9b for covering lens tubes of eyeglasses 61b of the surgical microscope 61; and a second cylindrical bag 2 connected to the main body 10a, where the second cylindrical bag 2 has projecting portions 9c, 9d for covering lens tubes of eyeglasses 62a of the binoculars 62. A slit 5 is formed between the first cylindrical bag 1 and the second cylindrical bag 2.