once introduced in spin tub 104 is also introduced into container 103 because the space in spin tub 104 is interconnected to the gap between container 103 and spin tub 104 through pores 114 the washing liquid continues to be supplied into spin tub 104 until its height reaches the predetermined first height in container 103 during the supply of the washing liquid height sensing section 203 senses the height of the washing liquid and sends it to microprocessor 201 as data microprocessor 201 compares the first height and the data with each other and determines if the height of the washing liquid in spin tub 104 and container 103 reaches the first height step s2 when the height of washing liquid reaches the first height microprocessor 201 initiates the operation of recirculation supply section 206 according to the operation of recirculation supply section 206 valve 110 is opened and pump 108 pumps out a part of the washing liquid in container 103 and spin tub 104 and supplies to spray nozzle 102 through recirculation pipe 109 the pumped washing liquid is sprayed through spray nozzle 102 into spin tub 104 step s3 that is a part of the washing liquid in container 103 is recirculated and sprayed while the supply of the washing liquid into spin tub 104 is continued when the height of the washing liquid reaches the first height in this case such recirculation and spray of the washing liquid as above facilitates dissolution of the detergent in the washing liquid and thereby shortens the entire washing time of the washing machine meanwhile washing liquid continues to be introduced and sprayed into spin tub 104 even after the height of the washing liquid reaches the first height height sensing section 203 continues to sense.