Abstract: A brake pedal immobilizing device has first and second shafts with crossheads mounted thereon for relative longitudinal sliding movement to clamp a brake pedal shaft between them. The second shaft carries a stand-off formed by a floor engaging foot extending longitudinally aligned below the crossheads, supporting the device on the vehicle floor during clamping adjustment. The second crosshead is formed with a hook and is rotatively mounted on one end of the first shaft while the other crosshead is mounted on the first shaft in a screw fit. An upper end of the first shaft is received in a sleeve with a shaft locking mechanism and terminates in a handle. A third crosshead carries a third shaft slidingly received in the first crosshead and having a lower end forming a locking/wedging pin for receipt in a bore in the second crosshead in the clamping position to complete enclosure of the brake pedal shaft. A barrier frame is attached to the first crosshead above a brake pedal to block forcing tool access.