Fixing unit and image forming apparatus including the same

An image forming apparatus comprising:

• a photosensitive medium, on which an electric latent image is formed;
• a fixing unit which fixes a toner image transferred onto a recording medium by applying heat and pressure to the toner image, wherein the fixing unit comprises:
• a fixing member which defines a fixing nip through which the recording medium passes, wherein the fixing member fixes the toner image transferred onto the recording medium by applying the heat and the pressure to the recording medium;
• a housing in which the fixing member is disposed, wherein the housing comprises an entrance part, via which the recording medium enters therein, and a discharge part, via which the recording medium is discharged therefrom;
• and
• a blocking part disposed on the housing and toward an image surface of the recording medium, to which the toner image is transferred, wherein the blocking part blocks nanodusts, which are generated while the toner image is being fixed to the recording medium, from being discharged to an outside of the housing.