Apparatus to collect and mix a hematic fluid, comprising a main body, on which at least one tray is positioned, able to receive and support at least a sac connected fluidically to a hematic fluid transfer tube, and at least a user interface to input and display data； the user interface is associated with the main body by means of removable connection means configured to allow the user interface to be disposed in a plurality of different positions with respect to the main body of the apparatus, so that the apparatus can assume different operating configurations.
