A testing device and probe elements thereof are provided. The testing device includes a circuit substrate, a plurality of probe elements, a first housing and a second housing. The plurality of probe elements are independent of each other and arranged at fixed intervals. Each probe element comprises a body, a first contact section and a second contact section. The body is provided with a plurality of strip-shaped perforations, and the body includes a first lateral side and a second lateral side opposite to each other. The first contact section is connected to the first lateral side, and the second contact section is connected to the second lateral side. The extension direction of the first contact section relative to the body and the extension direction of the second contact section relative to the body are distinct from each other.