  The top quark discovery in 1995 at Fermilab is one of the major proofs of the
standard model (SM). Due to its unique place in SM, the top quark is an
important particle for testing the theory and probing for new physics. This
article presents most recent measurements of top quark properties from the D0
detector. In particular, the measurement of the top quark mass, the top antitop
mass difference and the top quark decay width.
