PROBLEM TO BE SOLVED: To provide a work machine added with a mischief prevention mechanism, without raising costs.SOLUTION: A main key is rotated to a START position (ST02). When loosening the main key, and a key switch returns to an OPERATION position (ST03). Hold a driving speed control lever (ST04). An electric work machine starts forward driving or backward driving (ST05, 06, 07). An important point of the process flow is that electricity is supplied to the electric work machine on a condition that the START position is selected (ST02), and then the OPERATION position is selected (ST03). IF ST02 was omitted, no electricity is supplied to the electric work machine. By adding ST02, a mischief prevention effect may be obtained.SELECTED DRAWING: Figure 10
