Drum instrument comprising a frame (1) with a first rigid ring element which rests against the drumhead (20), and a second rigid ring element (23) which is situated around the first ring element and is in engagement with the drumhead (20). For regulation of the tension of the drumhead (20), one ring element (23) is movable relative to the other by means of a hydraulic system (10). This system (10) comprises a hydraulic actuator which acts upon the movable ring element (23) and which has a working chamber (11a) forming part of a volume for hydraulic fluid formed by the hydraulic system (10), so that the tension of the drumhead (20) can be regulated depending on the pressure in the working chamber (11a). The system (10) comprises setting means (12) for setting a basic pressure in the working chamber, and foot-operated means (13) for varying by foot the pressure in the working chamber (11a) of the hydraulic actuator, in such a way that the setting of the basic pressure achieved by means of the setting means (12) is retained. The hydraulic actuator (10) preferably acts upon the second ring element (23).
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