The invention relates to a jack (1) intended for a boules game. According to the invention, the jack (1) comprises a score counting device comprising two semi-spherical parts (2) opposite and separated by a central ring (3) so as to form a jack (1) of spherical shape, the semi-spherical parts (2) and the central ring (3) each comprising a marking (4, 5) intended to allow a double counting of the score. The two semi-spherical parts (2) are movable in rotation with respect to each other and with respect to the central ring (3) so as to allow the scores to be modified. Figure to be published with the abstract: Fig. 1
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