The invention relates to a cage (1) for the behavioural study of living organisms, in particular for a toximeter, comprising at least one compartment (2) intended to hold a living organism, the cage (1) being transparent at least on an observation side (4) in order to allow the observation of the living beings from an observation point (10) located at a distance from the observation side (4), the compartment (2) being delimited by separators (3), characterized in that the wall (31a) of one separator (3a) is inclined with respect to the wall (32b) of another separator (3b) such that the walls (31a, 32b) of the separators (3a, 3b) of a compartment (2) are closer together in the direction of the observation side (4), said separators (3a, 3b) being aligned along convergence lines that meet at the observation point (10).
