Abstract: A lever operating device in an excavator comprises an accelerator arm interlocked with an accelerator lever to pivot fore-and-aft, a pivotable arm interlocked with a control lever for a controlling valve of a drive unit in a working section to pivot fore-and-aft, a machine frame which bears the accelerator arm and pivotable arm arranged left and right in parallel and an abutting plate provided integrally with the accelerator arm to extend to the pivotable arm side, whereby the extending end of the abutting plate is located in the front position in the pivotal direction of turning on the controlling valve of the pivotable arm.