Bicycle crank arm coupling assistance device

A coupling-assist device for a bicycle crank arm comprising:

• a main body open through upper and lower portions, the main body having a space formed to receive a crank arm to be inserted;
• a handle member extending from a lower portion of the main body;
• a support frame including a fixing part formed on a lower portion thereof and coupled with the upper portion of the main body, and a position adjusting hole that is open through to allow a tool to be passed therethrough and connected to the crank arm, wherein the position adjusting hole enables adjustment of position of the tool in up and down directions;
• and
• a support means including a lower support means passed through the main body and fastened to a lower coupling hole of the crank arm, and an upper support means coupled with the position adjustment hole to adjust the positions of the tool.