Defibrating apparatus and fiber body manufacturing apparatus

A defibrating apparatus comprising:

• a rotor that rotates around an axis center of a rotation shaft as a rotation center;
• a defibrating chamber that accommodates the rotor and in which a defibrated product is formed from a material containing a fiber by rotation of the rotor;
• a supply pipe that supplies the material to the defibrating chamber;
• a discharge path that is in communication with the defibrating chamber and to which the defibrated product is discharged from the defibrating chamber;
• a discharge pipe that discharges the defibrated product from the discharge path by negative pressure being applied;
• a discharge unit that causes the discharge path to be in communication with the discharge pipe;
• an annular wall having an annular shape that is provided and spaced from the rotor in a radial direction of the rotor and defines the defibrating chamber;
• a housing that forms the discharge path extending in a circumferential direction of the annular wall by covering an outer side of the annular wall;
• a plurality of through-holes that is provided in the annular wall and causes the defibrating chamber to be in communication with the discharge path;
• and
• an outer peripheral wall that is included in the housing and provided at an interval from the annular wall in the radial direction, wherein
• the discharge unit is provided in the housing, and
• when a region, of the discharge path, including the discharge unit is a downstream discharge path, a region, of the discharge path, other than the downstream discharge path is an upstream discharge path, a region, of the annular wall, constituting the downstream discharge path is a downstream annular wall, a region, of the annular wall, constituting the upstream discharge path is an upstream annular wall, and the through-holes that cause the defibrating chamber to be in communication with the discharge path are communication holes,
• the communication holes are provided in the annular wall and, in a case in which the downstream annular wall is compared with the upstream annular wall having a same area as the downstream annular wall, air is less likely to pass through the downstream annular wall than the upstream annular wall.