Abstract: A device for centring objects, comprising a supporting frame (10) which supports an overall flat grid, the individual cells of which are each suitable for downwardly guiding an object to be centred, the device comprising a plurality of parallel rows of distinct centring members (400) which define nodes of the grid, each single row of the centring members (400) being supported by a single straight guide (202, 204, 224 ) of a series of coplanar, parallel straight guides (202, 204, 224), the straight guides (202, 204, 224) being mobile on the supporting frame (10), and being connected to one another by a second mechanism (211) which is configured such as to allow a reciprocal nearing and distancing of the straight guides (202, 204, 224) by second moving means (210, 210? 202?, 204?) provided for activating said second mechanism (211), the centring members (400) of each row being slidingly coupled to their relative straight guide (202, 204, 224) characterized in that each centring member (400) of each straight gui