A working device having six degrees of freedom and configured to perform work on a work piece within a working space (S) using end effectors , the working device comprising: a linear motion unit having three degrees of freedom and obtained by combining three linear motion actuators ; and a rotary unit having three degrees of freedom and obtained by combining a plurality of rotating mechanisms each having one or more rotational degrees of freedom, wherein the linear motion unit is mounted on a mount such that a base portion thereof is fixed to the mount , a base portion of the rotary unit is fixedly mounted on an output portion of the linear motion unit such that the mounting angle can be changed, the end effectors are mounted on both the output portion of the linear motion unit and an output portion of the rotary unit , characterized in that at least one of the plurality of rotating mechanisms of the rotary unit is a link actuation device having two degrees of freedom, the link actuation device includes: a proximal end side link hub ; a distal end side link hub ; and three or more link mechanisms via which the distal end side link hub is coupled to the proximal end side link hub such that a posture of the distal end side link hub can be changed relative to the proximal end side link hub , each link mechanism includes a proximal side end link member having one end rotatably coupled to the proximal end side link hub ; a distal side end link member having one end rotatably coupled to the distal end side link hub ; and an intermediate link member having opposite ends rotatably coupled to other ends of the proximal side and distal side end link members , respectively, and a posture control actuator configured to arbitrarily change the posture of the distal end side link hub relative to the proximal end side link hub is provided to each of two or more link mechanisms of the three or more link mechanisms . a linear motion unit having three degrees of freedom and obtained by combining three linear motion actuators ; and a rotary unit having three degrees of freedom and obtained by combining a plurality of rotating mechanisms each having one or more rotational degrees of freedom, wherein the linear motion unit is mounted on a mount such that a base portion thereof is fixed to the mount , a base portion of the rotary unit is fixedly mounted on an output portion of the linear motion unit such that the mounting angle can be changed, the end effectors are mounted on both the output portion of the linear motion unit and an output portion of the rotary unit , characterized in that at least one of the plurality of rotating mechanisms of the rotary unit is a link actuation device having two degrees of freedom, the link actuation device includes: a proximal end side link hub ; a distal end side link hub ; and three or more link mechanisms via which the distal end side link hub is coupled to the proximal end side link hub such that a posture of the distal end side link hub can be changed relative to the proximal end side link hub , each link mechanism includes a proximal side end link member having one end rotatably coupled to the proximal end side link hub ; a distal side end link member having one end rotatably coupled to the distal end side link hub ; and an intermediate link member having opposite ends rotatably coupled to other ends of the proximal side and distal side end link members , respectively, and a posture control actuator configured to arbitrarily change the posture of the distal end side link hub relative to the proximal end side link hub is provided to each of two or more link mechanisms of the three or more link mechanisms . <EOS>