The 2010 South American Rugby Championship "B" was the 11th edition of the second-tier competition of the leading national Rugby Union teams in South America. Division B was organised in Medellin (Colombia) from 24 to 31 October 2010. Participating nations were Colombia, holder, Peru, Venezuela and Costa Rica.
Meanwhile, was played the Under-20 tournament, won by Colombia.
In the main championship the winner was Peru
Standings
{ | class="wikitable" |- !width=165|Team !width=40|Played !width=40|Won !width=40|Drawn !width=40|Lost !width=40|For !width=40|Against !width=40|Difference !width=40|BP !width=40|Pts |- bgcolor=#ccffcc align=center |align=left| |3||3||0||0||95||17||+78||0||9 |- align=center |align=left| |3||2||0||1||62||45|||+17||0||6 |- align=center |align=left| |3||1||0||2||94||55||+39||0||3 |- align=center |align=left| |3||0||0||3||17||151||−134||0||0 |}