The present invention provides a biochip kit including a first housing; a biochip disposed inside the first housing and configured to include a plurality of molecular probes; and a second housing joined to the first housing and configured to form a reaction space with the first housing and to cover the biochip, wherein the second housing and the first housing are removably joined in a configuration to allow exposure of an upper surface of the biochip. Methods of testing biological samples using the biochip kits are also provided.