The Collider Detector at Fermilab (CDF) experiment collects data from
p-pbar collisions at c.m.s. energy of 1.96 TeV delivered by the
Tevatron accelerator complex.  At this energy all species of bottom
hadrons are  copiously produced.  This summer D0 and CDF experiments
discovered the first bottom baryon containing an s-quark, the Xi(b). 
In this talk I will present details of the Xi(b) observation and 
mass measurement at CDF.