Abstract: Gripping device (1) comprising two blades (9) adapted to be moved downwards and upwards by a jack (6) and each guided by two guides (14, 15), one being an outer guide and the other an inner guide, and each blade having an outer boss (12) which brings the blades (9) close to one another at the end of the downward movement in order to pinch the block which is to be gripped and transferred.Application: particularly for potting or planting out seedlings in blocks of friable material, for example compost.