Hassan told reporters that he was indebted to the party for the appointment and would do his best to strengthen the Congress in kerala.
V M Sudheeran, former KPCC President, had resigned on March 10, citing health grounds after completing three years in the post.
67-year-old Sudheeran was injured after a fall in Kozhikode while attending a party function. A full-fledged President is likely to be appointed after the Malappuram Lok Sabha bypoll on April 12.