The research was carried out from 9/2008 to 2/2009 by a group of tuberculosis prevention of Ninh Kieu district, Can Tho city, searching the relations among knowledge, attitude, and practice (K A.P) controlled by ages, sexes, education levels, and professions. Results: The patients who had proper knowledge accounted for 73%; those with the right attitude in detecting, preventing for therapy 84%; and the number of people with the right practice for therapy were 6%.