  Recently, \b{eta}-Mn-type Co-Zn-Mn alloys have gained particular attentions
as a new class of chiral magnets hosting skyrmion phase. In this work, a giant
topological Hall effect(THE)is observed during the wide temperature range below
220 K in the chiral magnet Co7Zn8Mn5. The maximum topological Hall resistivity,
-2.1 {\mu}{\Omega} cm, is obtained at 10 K. Moreover, the observed THE effect
persists up to Tc, which is mainly derived from the noncoplanar spin structure
with scalar spin chirality. In contrast, the formation of skyrmion phase is
substantiated at the temperature interval slightly below Tc by adopting the
magnetization and ac-susceptibility. Further, the possible signal of
skyrmion-conical coexisting phase is found based on the out-of-phase component
in magnetoelastic measurements. These results strongly suggest the chiral
magnet Co7Zn8Mn5 compound should be an excellent candidate to study the
topological magnetic properties and high temperature skyrmions.
