  Recently, the CDF collaboration reports an anomaly in dijet mass distribution
in association with a lepton and missing energy. We discuss a possibility that
the origin of the lepton and missing energy comes not from a W boson but a new
boson particle, which is also responsible for the dijet mass peak. We show that
such a situation can be realized in the framework of the minimal supersymmetric
standard model and the dijet anomaly can be explained.
