The/3--decay of the longer-lived l V~ isomer produced through the 17OEr(n ' p)lTOHo reaction has been investigated by using a versastile detector and coincidence equipment. The half-life and/3--decay energy were determined to be T1/2=2.76+0.05 min and Qp_ =3.85+0.15 MeV, respectively. In addition to the ground state band and some higher energy levels, the proposed level scheme of l~~ contains 11 states between 1.0 and 1.6 MeV (6 new ones), which are connected mutually by previously unknown low-energy transitions. Spin and/or parity assignments based mainly on coincidence data and multipolarity determinations are suggested for most of these states. By using systematic considerations and the nuclear projection model calculations several bands with K>2 can be assigned tentatively. As a side result the half-life of 169Ho was determined to be 4.7 _+ 0.2 min.