  We present a new mechanism of spontaneous baryogenesis. Usually such
mechanisms require a derivative coupling between a scalar field and baryon
current. In our model, the scalar field instead derivatively couples to a
current associated with some global symmetry $U(1)_Q$. In this case,
baryogenesis is still possible provided that an interaction exists, which
violates the baryon and $U(1)_Q$ symmetries simultaneously. As a concrete
example, we discuss baryogenesis in a flat direction with neither baryon nor
lepton charge.
