Governor Ram Naik accepted the recommendation and relieved Rajbhar from his post of Backward Class Welfare and Divyangjan Empowerment Minister, an official spokesperson said in Lucknow.
SBSP chief Om Prakash Rajbhar predicted that the saffron party will only win 15 seats in Uttar Pradesh.
Om Prakash Rajbhar said that he had waited long enough for the BJP to decide on seat sharing with SBSP but the ruling party kept postponing a decision.
SBSP chief Om Prakash Rajbhar told reporters in Ballia that he has resigned from the Yogi Adityanath government.
The minister had said he would, however, continue to be in charge of the Empowerment of Persons with Disabilities Department.
On whether he would participate in the future cabinet meetings, the minister said it would depend on the course of action adopted by the Adityanath government on the matter raised by him.
Rajbhar, who represents the Zahoorabad assembly constituency in Ghazipur district, is the Backward Class Welfare and Divyangjan Empowerment minister in the state government.
Rajbhar, who has been critical of alliance partner BJP in the past, reiterated that the SBSP had no tie-up with Shivpal Yadav's Morcha and that the alliance with BJP will continue.
The Suheldev Bhartiya Samaj Party, one of the alliance partners in the Yogi Adityanath government in Uttar Pradesh, has convened an emergency meeting in Lucknow on July 4.
While both leaders called the meeting a courtesy one, political overtones are being read as the Minister for Disability and Backward Classes Welfare is at daggers drawn with his ally, the BJP.