  The critical properties of the abelian Polyakov loop and the Polyakov loop in
terms of Dirac string are studied in finite temperature abelian projected
$SU(2)$ QCD. We evaluate the critical point and the critical exponents from
each Polyakov loop in the maximally abelian gauge using the finite-size scaling
analysis. Abelian dominance in this case is proved quantitatively. The critical
point of each abelian Polyakov loop is equal to that of the non-abelian
Polyakov loop within the statistical errors. Also, the critical exponents are
in good agreement with those from non-abelian Polyakov loops.
