areas the control is executed separately fig5 shows the relationship between the states of control member manipulation and operating commands issued to the working implement 5 in this respect the states of the control member manipulations for the boom down boom up stick out stick in and leftward offset operations are determined in accordance with inputting of the detection signals from the pressure sensors 39 a 39 b 41 a 41 b 40 a on the boom contraction side the boom extension side the stick contraction side the stick extension side and the offset contraction side as to the operating commands for the boom down boom up stick out and leftward offset operations solenoid excitation commands are outputted to the solenoid proportional pressure reducing valves 28 29 34 30 on the boom contraction side the boom extension side the stick contraction side and the offset contraction side causing the output valve passages to be opened further as to the operating commands to stop the boom down boom up stick in stick out and leftward offset operations solenoid non excitation commands are outputted to the solenoid proportional pressure reducing valves 28 29 31 34 30 on the boom contraction side the boom extension side the stick extension side the stick contraction side and the offset contraction side causing the output valve passages to be closed here the operating commands for.