To avoid danger accompanied by the conveying work of materials, and to quickly convey the materials.

A device body is provided on a crawler travel body 12 through a horizontal turning mechanism 16. A turning tower 28 is attached to a vertical turning mechanism 38 provided through a support frame 26 in front of the device body 14. The turning tower 28 can be vertically moved by a hydraulic cylinder 42 provided on the support frame 26. In addition, a telescopic boom 30 is attached to the tip part of the turning tower 28 through a vertical turning mechanism 56. A boom 30 can rise and fall using a boom cylinder 60. A telescopic arm 32 oscillated by an arm cylinder 74 as designated with an arrow 76 is pivoted to the tip of the boom 30, and a material grasping part 34 is provided at the tip of the arm 32.