A body fluid testing apparatus, comprising a containing chamber having a first opening on the bottom wall thereof; a plunger chamber having a plunger contacting with the side wall thereof and having a second opening on the bottom wall thereof, wherein the plunger chamber is disposed below the bottom wall of the containing chamber and in communication with the containing chamber through the first opening; and a testing chamber having a testing card designed to contain test strips and perpendicular to the longitudinal axial of the plunger chamber, wherein the testing chamber is disposed next to the side wall of the containing chamber and in communication with the plunger chamber through the second opening. The device according to the present disclosure can carry out the test of the body fluid, even though it has no chamber on the plunger body.