  Open supermembrane with a constant three-form flux in the pure spinor
formalism is examined. The BRST symmetry of the open supermembrane action leads
to non-commutative (NC) M-branes. In addition to the NC M5-brane with a
self-dual two-form flux, we find a NC M9-brane with an electric flux and a NC
M9-brane with a magnetic flux. The former reduces in the critical electric flux
limit to an M2-brane on the M9-brane, while the latter reduces in the strong
magnetic flux limit to infinitely many Kaluza-Klein monopoles dissolved into
the M9-brane. These NC M-branes are shown to preserve a half of 32
supersymmetries.
