  We estimate here chiral susceptibility at finite temperature within the
framework of the Nambu-Jona-Lasinio model (NJL) using the Wigner function
approach. We also estimate it in the presence of chiral chemical potential
($\mu_5$) as well as a non vanishing magnetic field ($B$). We use medium
separation regularization scheme (MSS) to calculate the chiral condensate and
corresponding susceptibility. It is observed that for a fixed value of chiral
chemical potential ($\mu_5$), transition temperature increases with the
magnetic field. While for the fixed value of the magnetic field, transition
temperature decreases with chiral chemical potential. For a strong magnetic
field, we observe non degeneracy in susceptibility for up and down type quarks.
