A fuel cell hose which is superior in flexibility (low-temperature
flexibility) and in barrier performance against hydrogen gas or water
without causing a defect such as buckling or cracking at the time of the
press-fitting of a connector. The fuel cell hose comprises an inner layer
in contact with fluid, a barrier layer formed on an outer peripheral
surface of the inner layer and an outer layer formed on an outer
peripheral surface of the barrier layer. The inner layer is made of a
material (A) containing a polyolefin resin and a styrene-isobutylene
block copolymer as essential components, the barrier layer is made of a
material (B) containing an ethylene-vinyl alcohol copolymer and a
modified polyolefin resin as essential components and the mixing ratio by
volume of the ethylene-vinyl alcohol copolymer to the modified polyolefin
resin is in the range of 95/5 to 30/70, and the outer layer is made of a
material (C) containing a polyamide resin as an essential component. The
barrier layer has an island-sea structure in which island phases composed
of the modified polyolefin resin are dispersed in a sea phase composed of
the ethylene-vinyl alcohol copolymer.