Exhibit 8.1

Main Subsidiaries of Quebecor Media Inc.



|                                       |  |                                               |  |                                
|-------------------------------------- |  | --------------------------------------------- |  | -------------------------------
|Name of Subsidiary                     |  | Jurisdiction of Incorporation or
Organization |  | Equity Interest/Voting Interest
|Videotron Ltd. / Vidéotron ltée        |  | Québec                                        |  | 100% / 100%                    
|                                       |  |                                              
|Videotron G.P.                         |  | Québec                                        |  | 100% / 100%                    
|                                       |  |                                              
|4Degrees Colocation Inc.               |  | Canada                                        |  | 100% /
100%(1)                 
|                                       |  |                                              
|Fibrenoire Inc.                        |  | Canada                                        |  | 100% /
100%(1)                 
|                                       |  |                                              
|Le SuperClub Vidéotron ltée            |  | Québec                                        |  | 100% / 100%                    
|                                       |  |                                              
|MediaQMI Inc.                          |  | Canada                                        |  | 100% / 100%                    
|                                       |  |                                              
|Quebecor Media Printing (2015) Inc.    |  | Canada                                        |  | 100% / 100%                    
|                                       |  |                                              
|Quebecor Media Network Inc.            |  | Canada                                        |  | 100% / 100%                    
|                                       |  |                                              
|CEC Publishing inc.                    |  | Québec                                        |  | 100% / 100%                    
|                                       |  |                                              
|Sogides Group Inc.                     |  | Canada                                        |  | 100% / 100%                    
|                                       |  |                                              
|Groupe TVA inc. / TVA Group inc.       |  | Québec                                        |  | 68.37% / 99.97%                
|                                       |  |                                              
|TVA Publications Inc.                  |  | Canada                                        |  | 100% /
100%(2)                 
|                                       |  |                                              
|Les Publications Charron & Cie Inc.    |  | Canada                                        |  | 100% /
100%(2)                 
|                                       |  |                                              
|Mels Studios and Postproduction G.P.   |  | Québec                                        |  | 100% /
100%(2)                 
|                                       |  |                                              
|Event Management Gestev Inc.           |  | Canada                                        |  | 100% / 100%                    
|                                       |  |                                              
|Québecor Sports et divertissement Inc. |  | Canada                                        |  | 100% / 100%                    
|                                       |  |                                              
|QMI Spectacles inc.                    |  | Québec                                        |  | 100% / 100%                    



|(1) | 4Degrees Colocation Inc. and Fibrenoire Inc. are wholly-owned subsidiaries of Videotron G.P.
|--- | --------------------------------------------------------------------------------------------

|(2) | TVA Publications Inc., Les Publications Charron & Cie Inc. and Mels Studios and Postproduction G.P. are wholly-owned subsidiaries of TVA Group inc.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------