Disclosed is a sampling device (1) for sampling a body cavity, in particular for sampling the vagina and/or cervix. The sampling device comprises a tube (2) having two open ends, a sample-collecting member (3) and a plunger (4). The plunger is inserted in the tube, with the distal plunger end (6) protruding from the distal tube end, and carries the sample-collecting member at the proximal tube end. The plunger is displaceable in the proximal direction in the tube from a retracted introduction position into an extended sampling position. In the introduction position, the sampling member is situated inside the tube. In the sampling position the sampling member protrudes from the tube. The device is also provided with an extension limiter (12, 13) which defines a maximum extension length (Z) over which the sample-collecting member can be extended. The extension limiter further comprises an extension lock (14, 15) provided inside the tube to fix the position of the plunger with respect to the tube at the maximum extension length.