A body fluid testing device having an improved illumination, includes: a test unit including: a sample part having a sheet portion, with body fluid of a user applied onto a first surface thereof； an illumination part having a light source for providing light to the sample part； a battery for supplying power to the illumination part； and a casing receiving a lens group for magnifying the body fluid applied onto the sheet portion； and a user terminal configured such that a camera takes an image of the sample part magnified by the lens group, prior to analyzing the image by the user terminal.
