FERRITIC STAINLESS STEEL FOR EGR COOLER AND EGR COOLER

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[Problem] Provided are a ferritic stainless steel suitable for EGR cooler members to be Ni-brazed, and an EGR cooler comprising the steel. An EGR cooler having a structure joined by Ni-brazing is produced by using a ferritic stainless steel which contains, by mass, C : at most 0.03%, Si : from more than 0.1 to 3%, Mn : from 0.1 to 2%, Cr : from 10 to 25%, Nb : from 0.3 to 0.8%, and N : at most 0.03%, and optionally selectively contains (a) one or more of Mo, Cu, V and W in a total amount of at most 4%, (b) one or more of Ti, Al and Zr in a total amount of at most 0.3%, (c) one or more of Ni and Co in a total amount of at most 5%, and (d) one or more of REMs (rare earth metals) and Ca in a total amount of at most 0.2%, with a balance of Fe and inevitable impurities.