  This paper describes the track-finding algorithm that is used for event
reconstruction in the Belle II experiment operating at the SuperKEKB B-factory
in Tsukuba, Japan. The algorithm is designed to balance the requirements of a
high efficiency to find charged particles with a good track parameter
resolution, a low rate of spurious tracks, and a reasonable demand on CPU
resources. The software is implemented in a flexible, modular manner and
employs a diverse selection of global and local track-finding algorithms to
achieve an optimal performance.
