Kalpana told reporters here last evening that she was joining AAP as she was not happy with the functioning of the Congress in Madhya Pradesh.
She said she had complained about this to the Congress leadership, but in vain.
Parulekar, who had contested and won as an independent nominee in 1998, later joined the Congress and won in 2008 Assembly elections, but lost during the state polls last year.
Two days back, Congress MLA Sanjay Pathak had quit the party alleging ill-treatment and joined the BJP. Pathak said he resigned from the Congress as the grand old party no longer remained the party of Nehru and Gandhi.
Another Congress leader Rajendra Singh Gehlot had also joined BJP along with Pathak.