To provide a working lamp device of a construction machine capable of enhancing workability of the work for adjusting the attitude for mounting a working lamp body on a vehicle body.

In this working lamp device, an attitude adjusting mechanism 14 is composed of a working lamp supporting member 15, a shaft body 18 inserted into a fixed bracket 12 and having one end side fixed on the working lamp supporting member 15, a block body 19 mounted on the other end side of the shaft body 18, a toothed washer 21 and a plain washer 22 provided between the fixed bracket 12 and the block body 19, a compression spring 23 provided between the working lamp supporting member 15 and the fixed bracket 12, and an operation lever 24 provided in the block body 19. Consequently, when the operation lever 24 is moved to an adjustment position, the block body 19 is separated from the fixed bracket 12, and the force pressing each of the toothed washers 21 is released. As a result, the block body 19 and the working lamp supporting member 15 can turn centered on the shaft body 18, and the working lamp body 13 can turn in the right and left directions.