Tank holding mechanism for gas tank and vehicle in which gas tank is mounted using the same

A tank holding mechanism for holding a gas tank that has a cylindrical portion and a pair of hemispherical-shaped domical portions formed on respective sides of the cylindrical portion, comprising:

• a tank accommodating portion configured to contact a peripheral wall of the cylindrical portion of the gas tank;
• tank end-side members configured to be provided near respective ends of the gas tank;
• at least one tank band configured to push the gas tank against the tank accommodating portion, wherein the tank band is further configured to be routed from one of the domical portions through the cylindrical portion to the other domical portion, with the tank band extending along a diagonal line of the gas tank on an outer face of the cylindrical portion, conforming to the outer face of the cylindrical portion, and conforming to hemispherical outer faces of both of the domical portions;
• and
• band securing portions configured to secure end portions of the tank band to the respective tank end-side members.