CONSTRUCTION MACHINE

PROBLEM TO BE SOLVED: To provide a construction machine which can contribute to cost reduction and reduction in the number of man-hours in manufacturing by enabling reduction in members for lifting the construction machine, can easily secure strength, and has a lifting means dispensing with the attachment/detachment of a lifting member. SOLUTION: An upper turning structure 3 is installed on a lower travelling structure 1 via a swing device 3. A working attachment 6 which has a first boom 8 and a second boom 11 connected to the first boom so as to be turnable is attached to the upper turning structure 3. The second boom 11 comprises a pair of right and left outside plates 22, and a pair of right and left inside plates 24 which are integrally provided between the outside plates 22. One end of a hydraulic cylinder 12 for turning the second boom 11 is connected to the inside plate 24 by means of a pin 20. In an upper portion of the inside plate 24, an upward protruding portion 24a is formed as a part of the upper portion of the inside plate, and a hole 24b for hooking the lifting member 34 is formed at the protruding portion 24a. COPYRIGHT: (C)2010,JPO&INPIT