Abstract: A micro-droplet plate including at least one fixed element which is a rigid flat support which has an upper face and a lower face, having, on said upper face, wells connected together by microchannels, said wells being delimited by a hydrophobic rim and crossed by a hole, where said wells and said microchannels define at least one microfluidic circuit; and moving elements, received in said wells through said holes, which are cylinders having an upper base and a lower base. The moving elements move, even independently of each other, along their vertical axis, and the upper base of said moving elements includes a hydrophilic surface with relief items.