A construction machine comprising: a vehicle body frame (7, 12) forming a support structure; a cab that is disposed to be positioned on a front side and an upper side of said vehicle body frame (7, 12) and in the inside of which an operator's room is defined; a plurality of vibration isolating members that are disposed between said vehicle body frame (7, 12) and said cab to support said cab on said vehicle body frame (7, 12) in a vibration isolating state, and a plurality of intermediate connecting members (20, 31) that fix said plurality of vibration isolating members to said vehicle body frame (7, 12) fixed to a lower surface of said vehicle body frame (7, 12), wherein each of said vibration isolating members includes: a main body part having a damping function of vibrations; a flange part that is disposed on an outer periphery of said main body part; and a fastening part that projects upward from said main body part and is mounted on a bottom plate (15, 17) of said cab, and wherein each of said intermediate connecting members (20, 31) includes: a connecting tool that connects said vibration isolating member to said lower surface of said vehicle body frame (7, 12); and a spacer (25, 32) that adjusts a height position of said cab to said vehicle body frame (7, 12); characterized in that: said connecting tool includes: a disc part that is composed of an annular plate body and is mounted to said lower surface of said vehicle body frame (7, 12); and a flange mounting part that is formed at an inner diameter side of said disc part and projects upward and on which a lower surface of the flange part of said vibration isolating member is mounted. a vehicle body frame (7, 12) forming a support structure; a cab that is disposed to be positioned on a front side and an upper side of said vehicle body frame (7, 12) and in the inside of which an operator's room is defined; a plurality of vibration isolating members that are disposed between said vehicle body frame (7, 12) and said cab to support said cab on said vehicle body frame (7, 12) in a vibration isolating state, and a plurality of intermediate connecting members (20, 31) that fix said plurality of vibration isolating members to said vehicle body frame (7, 12) fixed to a lower surface of said vehicle body frame (7, 12), wherein each of said vibration isolating members includes: a main body part having a damping function of vibrations; a flange part that is disposed on an outer periphery of said main body part; and a fastening part that projects upward from said main body part and is mounted on a bottom plate (15, 17) of said cab, and wherein each of said intermediate connecting members (20, 31) includes: a connecting tool that connects said vibration isolating member to said lower surface of said vehicle body frame (7, 12); and a spacer (25, 32) that adjusts a height position of said cab to said vehicle body frame (7, 12); characterized in that: said connecting tool includes: a disc part that is composed of an annular plate body and is mounted to said lower surface of said vehicle body frame (7, 12); and a flange mounting part that is formed at an inner diameter side of said disc part and projects upward and on which a lower surface of the flange part of said vibration isolating member is mounted. a main body part having a damping function of vibrations; a flange part that is disposed on an outer periphery of said main body part; and a fastening part that projects upward from said main body part and is mounted on a bottom plate (15, 17) of said cab, and wherein each of said intermediate connecting members (20, 31) includes: a connecting tool that connects said vibration isolating member to said lower surface of said vehicle body frame (7, 12); and a spacer (25, 32) that adjusts a height position of said cab to said vehicle body frame (7, 12); characterized in that: said connecting tool includes: a disc part that is composed of an annular plate body and is mounted to said lower surface of said vehicle body frame (7, 12); and a flange mounting part that is formed at an inner diameter side of said disc part and projects upward and on which a lower surface of the flange part of said vibration isolating member is mounted. a connecting tool that connects said vibration isolating member to said lower surface of said vehicle body frame (7, 12); and a spacer (25, 32) that adjusts a height position of said cab to said vehicle body frame (7, 12); characterized in that: said connecting tool includes: a disc part that is composed of an annular plate body and is mounted to said lower surface of said vehicle body frame (7, 12); and a flange mounting part that is formed at an inner diameter side of said disc part and projects upward and on which a lower surface of the flange part of said vibration isolating member is mounted. a disc part that is composed of an annular plate body and is mounted to said lower surface of said vehicle body frame (7, 12); and a flange mounting part that is formed at an inner diameter side of said disc part and projects upward and on which a lower surface of the flange part of said vibration isolating member is mounted.