An image forming device comprising: a main casing; and a process unit (9,9A- 9F) comprising: a plurality of cartridges arrayed side by side with a space between neighboring cartridges and defining an array direction, each cartridge accommodating therein a developing agent; and a support unit (12, 12A-12F) supporting the plurality of cartridges and movable in the array direction relative to the main casing between an accommodated position where the support unit is accommodated in the main casing and a pulled out position where the support unit is moved away from the accommodated position for detachment and attachment of the support unit from and to the main casing, the support unit comprising: a frame (31,31A-31F); a first handgrip (33,33A,33B,40C,40D,40E,40F) including a leg portion (39, 39A-39F) having a connected portion connected to the frame (31,31A-31F), and a grip portion (40, 40A-40F) connected to the leg portion; and a second hand grip positioned downstream of the first hand grip (33,33A,33B,40C,40D,40E,40F) in a pulling out direction along the array direction for pulling out the support unit, wherein the grip portion (40, 40A) of the first handgrip (33, 33A) is positioned upstream of the position of the center of gravity of the process unit (9, 9A) in the pulling out direction, whereas the second hand grip is positioned downstream of the position of the center of gravity of the process unit (9, 9A) in the pulling out direction, characterized in that the grip portion (40, 40A-40F), in a state where the support unit is at the accommodated position, is positioned downstream of a most upstream end of a most upstream side cartridge in the pulling out direction. a main casing; and a process unit (9,9A- 9F) comprising: a plurality of cartridges arrayed side by side with a space between neighboring cartridges and defining an array direction, each cartridge accommodating therein a developing agent; and a support unit (12, 12A-12F) supporting the plurality of cartridges and movable in the array direction relative to the main casing between an accommodated position where the support unit is accommodated in the main casing and a pulled out position where the support unit is moved away from the accommodated position for detachment and attachment of the support unit from and to the main casing, the support unit comprising: a frame (31,31A-31F); a first handgrip (33,33A,33B,40C,40D,40E,40F) including a leg portion (39, 39A-39F) having a connected portion connected to the frame (31,31A-31F), and a grip portion (40, 40A-40F) connected to the leg portion; and a second hand grip positioned downstream of the first hand grip (33,33A,33B,40C,40D,40E,40F) in a pulling out direction along the array direction for pulling out the support unit, a plurality of cartridges arrayed side by side with a space between neighboring cartridges and defining an array direction, each cartridge accommodating therein a developing agent; and a support unit (12, 12A-12F) supporting the plurality of cartridges and movable in the array direction relative to the main casing between an accommodated position where the support unit is accommodated in the main casing and a pulled out position where the support unit is moved away from the accommodated position for detachment and attachment of the support unit from and to the main casing, the support unit comprising: a frame (31,31A-31F); a first handgrip (33,33A,33B,40C,40D,40E,40F) including a leg portion (39, 39A-39F) having a connected portion connected to the frame (31,31A-31F), and a grip portion (40, 40A-40F) connected to the leg portion; and a second hand grip positioned downstream of the first hand grip (33,33A,33B,40C,40D,40E,40F) in a pulling out direction along the array direction for pulling out the support unit, a frame (31,31A-31F); a first handgrip (33,33A,33B,40C,40D,40E,40F) including a leg portion (39, 39A-39F) having a connected portion connected to the frame (31,31A-31F), and a grip portion (40, 40A-40F) connected to the leg portion; and a second hand grip positioned downstream of the first hand grip (33,33A,33B,40C,40D,40E,40F) in a pulling out direction along the array direction for pulling out the support unit, wherein the grip portion (40, 40A) of the first handgrip (33, 33A) is positioned upstream of the position of the center of gravity of the process unit (9, 9A) in the pulling out direction, whereas the second hand grip is positioned downstream of the position of the center of gravity of the process unit (9, 9A) in the pulling out direction, characterized in that the grip portion (40, 40A-40F), in a state where the support unit is at the accommodated position, is positioned downstream of a most upstream end of a most upstream side cartridge in the pulling out direction.