Zero-degree assistant's device for a microscope

A zero-degree assistant's device for a microscope has a tube carrier ( 2 ) for the principal observer's tube, an interface ( 5 ) for the microscope body, an assistant's module ( 6 ), pivotable about an axis ( 4 ), having an interface ( 7 ) for an assistant's tube, and having a retaining device ( 8, 12 ) for releasing and immobilizing the assistant's module ( 6 ), the tube carrier ( 2 ) for the principal observer's tube being mounted tiltably about a rotation axis ( 10 ) in such a way that tilting of the tube carrier ( 2 ) for the principal observer's tube into a tilted position makes possible unrestricted pivoting of the assistant's module ( 6 ).