A washing machine comprising: a washing tub accommodating laundry and rotatably disposed about a vertical axis; a pulsator rotatably disposed in the washing tub; a drive shaft rotating the pulsator; a dehydration shaft connected to the washing tub and having a first hollow through which the drive shaft passes; a solenoid generating a magnetic field when a current is applied; a magnetic core surrounding a periphery of the solenoid; an armature lifted by an attraction force between the armature and the magnetic core when a current is applied to the solenoid; a clutching coupler having a second hole through which the dehydration shaft passes, wherein the clutching coupler is lifted and lowered along the dehydration shaft integrally with the armature, shaft-couples the drive shaft and the dehydration shaft to each other at a lowered position, and shaft-decouples the drive shaft and the dehydration shaft from each other at a lifted position lifted from the lowered position according to the lifting of the armature; an elastic member pressing the clutching coupler downward; characterised in that it further comprises: a lever having a support point of which a position is fixed with respect to the dehydration shaft and an operation end located at a point spaced by a predetermined distance from the support point; a guide groove provided on an inner peripheral surface of the clutching coupler defining the second hole and guiding a relative movement of an operating end with respect to the clutching coupler when the clutching coupler is lifted or lowered; and a lowering restriction section disposed in the guide groove and caught by the operating end so that the clutching coupler is not lowered in a state where the clutching coupler is located at the lifted position and a current is not applied to the solenoid. a washing tub accommodating laundry and rotatably disposed about a vertical axis; a pulsator rotatably disposed in the washing tub; a drive shaft rotating the pulsator; a dehydration shaft connected to the washing tub and having a first hollow through which the drive shaft passes; a solenoid generating a magnetic field when a current is applied; a magnetic core surrounding a periphery of the solenoid; an armature lifted by an attraction force between the armature and the magnetic core when a current is applied to the solenoid; a clutching coupler having a second hole through which the dehydration shaft passes, wherein the clutching coupler is lifted and lowered along the dehydration shaft integrally with the armature, shaft-couples the drive shaft and the dehydration shaft to each other at a lowered position, and shaft-decouples the drive shaft and the dehydration shaft from each other at a lifted position lifted from the lowered position according to the lifting of the armature; an elastic member pressing the clutching coupler downward; characterised in that it further comprises: a lever having a support point of which a position is fixed with respect to the dehydration shaft and an operation end located at a point spaced by a predetermined distance from the support point; a guide groove provided on an inner peripheral surface of the clutching coupler defining the second hole and guiding a relative movement of an operating end with respect to the clutching coupler when the clutching coupler is lifted or lowered; and a lowering restriction section disposed in the guide groove and caught by the operating end so that the clutching coupler is not lowered in a state where the clutching coupler is located at the lifted position and a current is not applied to the solenoid. a lever having a support point of which a position is fixed with respect to the dehydration shaft and an operation end located at a point spaced by a predetermined distance from the support point; a guide groove provided on an inner peripheral surface of the clutching coupler defining the second hole and guiding a relative movement of an operating end with respect to the clutching coupler when the clutching coupler is lifted or lowered; and a lowering restriction section disposed in the guide groove and caught by the operating end so that the clutching coupler is not lowered in a state where the clutching coupler is located at the lifted position and a current is not applied to the solenoid.