A fluoro rubber composition which is able to make both a high tensile strength and a high elongation at break after vulcanization compatible with each other and from which favorable mechanical characteristics are obtained even in a high-temperature environment; and a bladder for tire fabrication, which is manufactured using the same are provided. The fluoro rubber composition includes a rubber component containing a fluoro rubber and carbon black, wherein in a dynamic viscoelasticity test of an unvulcanized rubber by a rubber process analyzer (RPA) (measurement temperature: 100° C., measurement frequency: 1 Hz), a difference δGA′ (G′(1%)−G′(100%)) between a shear modulus G′ (1%) at the time of a dynamic strain of 1% and a shear modulus G′ (100%) at the time of a dynamic strain of 100% is 120 kPa or more and not more than 3,000 kPa.