A separating device comprising: a carrying-out portion for carrying-out a medium; a conveying portion for conveying said medium carried out by said carrying-out portion, and a separating portion provided between said carrying-out portion and said conveying portion so as to be rotatable about a rotation fulcrum, said separating portion having an end portion which is contactable and separable with said carrying-out portion, said end portion of said separating portion contacting said carrying-out portion to thereby separate said medium from said carrying-out portion, and wherein said separating portion comprises: a first guiding portion rotatably provided for guiding said medium separated from said carrying-out portion to said conveying portion; and a second guiding portion rotatably provided for guiding said medium separated from said carrying-out portion to said conveying portion; wherein said first guiding portion has a rotation center which is located on said carrying-out portion side with respect to said rotation fulcrum of said separating portion, and wherein, when a straight line (Lo) is defined by connecting a contact area of said carrying-out portion and a contact area of said conveying portion, said rotation center of said first guiding portion is located on said straight line (Lo) side with respect to said rotation fulcrum of said separating portion; wherein said second guiding portion has a rotation centre which is located on said conveying portion side with respect to said rotation fulcrum, and is located on said straight line (Lo) side with respect to said rotation fulcrum of said separating portion; characterised in that a distance between said rotation centre of said first guiding portion and said rotation fulcrum is larger than a distance (mi) between said rotation centre of said second guiding portion and said rotation fulcrum; wherein said distances (ml,m2) are projected onto a straight line defined by connecting the lower end of the outer circumference of said first guiding portion and the contact area of said conveying portion. a carrying-out portion for carrying-out a medium; a conveying portion for conveying said medium carried out by said carrying-out portion, and a separating portion provided between said carrying-out portion and said conveying portion so as to be rotatable about a rotation fulcrum, said separating portion having an end portion which is contactable and separable with said carrying-out portion, said end portion of said separating portion contacting said carrying-out portion to thereby separate said medium from said carrying-out portion, and wherein said separating portion comprises: a first guiding portion rotatably provided for guiding said medium separated from said carrying-out portion to said conveying portion; and a second guiding portion rotatably provided for guiding said medium separated from said carrying-out portion to said conveying portion; wherein said first guiding portion has a rotation center which is located on said carrying-out portion side with respect to said rotation fulcrum of said separating portion, and wherein, when a straight line (Lo) is defined by connecting a contact area of said carrying-out portion and a contact area of said conveying portion, said rotation center of said first guiding portion is located on said straight line (Lo) side with respect to said rotation fulcrum of said separating portion; wherein said second guiding portion has a rotation centre which is located on said conveying portion side with respect to said rotation fulcrum, and is located on said straight line (Lo) side with respect to said rotation fulcrum of said separating portion; characterised in that a distance between said rotation centre of said first guiding portion and said rotation fulcrum is larger than a distance (mi) between said rotation centre of said second guiding portion and said rotation fulcrum; wherein said distances (ml,m2) are projected onto a straight line defined by connecting the lower end of the outer circumference of said first guiding portion and the contact area of said conveying portion. a first guiding portion rotatably provided for guiding said medium separated from said carrying-out portion to said conveying portion; and a second guiding portion rotatably provided for guiding said medium separated from said carrying-out portion to said conveying portion; wherein said first guiding portion has a rotation center which is located on said carrying-out portion side with respect to said rotation fulcrum of said separating portion, and wherein, when a straight line (Lo) is defined by connecting a contact area of said carrying-out portion and a contact area of said conveying portion, said rotation center of said first guiding portion is located on said straight line (Lo) side with respect to said rotation fulcrum of said separating portion; wherein said second guiding portion has a rotation centre which is located on said conveying portion side with respect to said rotation fulcrum, and is located on said straight line (Lo) side with respect to said rotation fulcrum of said separating portion; characterised in that a distance between said rotation centre of said first guiding portion and said rotation fulcrum is larger than a distance (mi) between said rotation centre of said second guiding portion and said rotation fulcrum; wherein said distances (ml,m2) are projected onto a straight line defined by connecting the lower end of the outer circumference of said first guiding portion and the contact area of said conveying portion.