Power tool with vibration damping handle

A power tool, comprising:

• a driving force transmission mechanism that transmits a rotary driving force from a rotary drive source to operate the power tool;
• a housing that receives said driving force transmission mechanism therein and provides an outer shell for the power tool;
• a tail cover provided at at least a region of said housing, which region is to be held by an operator,
• said tail cover comprising an elastomer member integrally formed with a resin member,
• said resin member having a higher hardness than said elastomer member,
• said tail cover having a bilayer formation structure with said elastomer member placed on an outer side of said resin member,
• said resin member defining a portion connected to said housing,
• said elastomer member defining a receiving portion, said receiving portion being one of i) a gel pack-receiving portion and ii) a viscoelastic polymer-receiving portion,
• said receiving portion being composed only of said elastomer member and being free of said resin member;
• and
• one of i) a gel pack containing a gel-like material enclosed by a resin film, and ii) a viscoelastic polymer placed between said tale cover and said housing in said receiving portion formed by said elastomer member.