An operation device for a construction machine , the construction machine having an operator's seat for an operator of said construction machine , the operation device comprising: a support member that is disposed on at least one of left and right sides of said operator's seat ; an operating tool stand that is disposed to said support member and is rotatable between an operating position in which said operating tool stand extends forward from said support member and a tilt-up position in which said operating tool stand extends upward with respect to said support member ; and an operating tool that is disposed at a front end side of said operating tool stand to operate said construction machine , wherein said operating tool stand includes a rotating member that is rotatably mounted about a support pin as a rotational pivot, said supporting pin being mounted to said support member , characterized in that said operating tool stand includes a cam roller that is rotatably mounted to said rotating member and is configured to rotate together with said rotating member ; said support member is provided with an elastic member that has a contact surface with which said cam roller comes in elastic contact in accordance with rotation of said rotating member ; said contact surface is disposed on the outer side of said cam roller with respect to the rotational pivot; said contact surface of said elastic member has an operating position contact part (60A1) with which said cam roller comes in contact in said operating position, and a tilt-up position contact part (60B1) with which said cam roller comes in contact in said tilt-up position; and a dimension (B) from a rotating center (O) of said rotating member to said operating position contact part (60A1) is formed to be smaller than a dimension (C) from the rotating center (O) of said rotating member to said tilt-up position contact part (60B1) so as to reduce the rotating speed of said cam roller . a support member that is disposed on at least one of left and right sides of said operator's seat ; an operating tool stand that is disposed to said support member and is rotatable between an operating position in which said operating tool stand extends forward from said support member and a tilt-up position in which said operating tool stand extends upward with respect to said support member ; and an operating tool that is disposed at a front end side of said operating tool stand to operate said construction machine , wherein said operating tool stand includes a rotating member that is rotatably mounted about a support pin as a rotational pivot, said supporting pin being mounted to said support member , characterized in that said operating tool stand includes a cam roller that is rotatably mounted to said rotating member and is configured to rotate together with said rotating member ; said support member is provided with an elastic member that has a contact surface with which said cam roller comes in elastic contact in accordance with rotation of said rotating member ; said contact surface is disposed on the outer side of said cam roller with respect to the rotational pivot; said contact surface of said elastic member has an operating position contact part (60A1) with which said cam roller comes in contact in said operating position, and a tilt-up position contact part (60B1) with which said cam roller comes in contact in said tilt-up position; and a dimension (B) from a rotating center (O) of said rotating member to said operating position contact part (60A1) is formed to be smaller than a dimension (C) from the rotating center (O) of said rotating member to said tilt-up position contact part (60B1) so as to reduce the rotating speed of said cam roller . <EOS>