Ark is a Bangladeshi rock band formed in 1991 in Dhaka City by keyboardist . The original founder members are Ashiquzzaman Tulu, and Shamim. As of 2017, the band line-up re-consists of lead vocalist Syed Hasanur Rahman, keyboardist Tinku Azizur Rahman and drummer Hassan Towhidur Rahman (Rumi Rahman). Ark rose to mainstream fame in the 1990s, and is one of the "Big Three of Rock" along with Feelings/Nagar Baul and LRB, who were responsible for developing and popularizing rock music in Bangladesh in the 1990s.