The tracking detector of the KLOE experiment is 4m diameter, 3.3 m length d
rift chamber, designed to contain a large fraction of the decays of low- en
ergy K-1 produced at the Frascati DA phi DNE phi -factory. The chamber is m
ade by a thin carbon fiber structure and operated with a helium-based gas m
ixture in order to minimise conversion of low-energy photons and multiple s
cattering inside the sensitive volume. The tracking information is provided
by 58 layers of stereo wires defing 12,582 cells, 2 x 2 cm(2) in size in t
he 12 innermost layers and 3 x 3 cm(2) in the outer ones. Details of the ch
amber design, calibration procedure and tracking performances are presented
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