Tomar is an accused in a fake law degree case, which had triggered a controversy leading to his resignation from Arvind Kejriwal's cabinet in 2015.
"After the cancellation of Jitender Singh Tomar's law degree, it is important that legal action be initiated against him and he be expelled from the Delhi Assembly, for contesting the election by filing information of a bogus degree," Delhi BJP chief Manoj Tiwari said.
In a statement issued by the party's Delhi unit, Tiwari said, "Before the Delhi Assembly election, Kejriwal had promised that he would not allow a single tainted person to sit in the Assembly.
The decision to cancel Tomar's degree was taken by the Senate members of the Tilka Manjhi Bhagalpur University (TMBU) in Bihar.
The controversy relates to the acquisition of the law degree by Tomar on the basis of a doubtful enrolment in Biswanath Law College in Munger in the 1994-95 academic session. He had claimed to have passed the law examination in 1998-99.