To speedily carry a portable fire-fighting pump to near the site of fire irrespectively of geographical conditions and further to smoothly start fire-fighting work by speedily moving the carried portable fire-fighting pump down from the bed.

A portable fire-fighting pump 18 and members 23, 24 and 25 for fire-fighting are freely attachably and detachably fitted onto the bed 11 of main body 10 of self-traveling vehicle provided with a crawler 12 for traveling so that the portable fire-fighting pump 18 can be speedily carried to near the site of fire irrespectively of geographical conditions. Further, the portable fire-fighting pump 18 is fitted onto a movable rail 17 to be freely slid to a fixed rail 15 fixed on the bed 11 and the portable fire-fighting pump 18 is pulled out of the bed 15 by sliding the movable rail 17 so that the portable fire-fighting pump 18 can be speedily moved down from the bed 11.