The present application relates to: (i) a sampler device (11) for taking a sample of biological fluid which comprises a capillary component (13) and a base (14) rigidly connected to said capillary component (13) and provided with a first connector (16) capable of being reversibly attached in a leaktight manner to a second connector (22) of a dispensing device (21) (ii) a dispensing device (21) which also comprises means for transferring diluting fluid (23) which open into said second connector (22). The application also relates to a biological analysis apparatus implementing the sampler and dispensing devices and to a method for sampling and dispensing a biological fluid.
