A working machine may include a body, a working part, a prime mover, a handle, a trigger member configured to be operated by the user for driving the prime mover; and a lock member. The handle may be configured to shift between a working state and a non-working state. The lock member may be configured to: move between a non-restriction position and a restriction position, be positioned at the non-restriction position when the handle is in the working state, be positioned at the restriction position when the handle is in the non-working state, and move from the non-restriction position to the restriction position in response to shift of the handle from the working state to the non-working state.