Those who were sworn in included senior BJP leader Umesh Katti, (becoming Minister for the third time), Aravind Limbavali, Murgesh Nirani, S Angara, MTB Nagaraju, R Shankar and C P Yogeeshwara (all three MLCs).
While this will fill all the seven vacancies, one slot was kept vacant.
Notable exclusion from those being inducted into the Cabinet is Munirathna, a defector who recently won the by polls.
Of the seven new legislators there are two each from Veerashaiva-Lingayat, Kuruba and Scheduled Caste communities and one from Vokkaliga community.
BJP National General Secretary in-charge of party affairs in Karnataka Arun Singh, BJP State President Nalin Kumar Kateel and cabinet colleagues attended the swearing-in ceremony.
Mr Yediyurappa had earlier said BJP National President J P Nadda would grace the occasion. However, he did not attend. (UNI)