The 1988 Panasonic Cup was the 15th edition of the NSWRL Midweek Cup, a NSWRL-organised national club Rugby League tournament between the leading clubs and representative teams from the NSWRL, the BRL, the CRL and Papua New Guinea. A total of 19 teams from across Australia and Papua New Guinea played 18 matches in a straight knock-out format, with the matches being held midweek during the premiership season.