To prevent a hydraulic oil from being spattered by covering a joint member for connecting an oil cooler to a pipe without causing a deterioration and a damage due to heat.

This construction machine has a storage case 26 for storing the joint member 25 for connecting the inflow side connection pipe 22D and a supply pipe 12 of the oil cooler 22 to each other. The storage case 26 is formed in a metal container made of a metal. Therefore, the storage case 26 can separate the joint member 25 from an engine 7. Since the storage case 26 is formed of a metal, it can sufficiently withstand the deterioration due to heat and the damage due to contact. Consequently, the hydraulic oil is surely prevented from being spattered near the engine 7, and the connected position of the oil cooler 22 and the supply pipe 12 can be freely arranged.