PURPOSE: To obtain the title compd. of high purity by treating a compd. obtained by esterifying a novel compd. such as 4-hydroxy3,3,6,6-tetrabicyclo [3.1.0] hexan-2-one with a hydroxyl ion supply source in an aq. medium.

CONSTITUTION: A compd. represented by formula I (wherein R is an atom or a group capable of forming an anion R- stable under a reaction condition, especially pref., hydroxy, sulfonyloxy and methanesulfonyloxy and R1 and R2 are H or methyl) is treated with a hydroxyl ion supply source (especially pref., alkali metal hydroxide) in an aq. medium (especially pref. containing an aprotic solvent) to obtain cis-cyclopropanecarboxylic acid. The compd. represented by the formula I is obtained by esterifying a novel compd. represented by formula III. The compd. represented by the formula III is obtained by treating a novel compd. represented by formula IV with a reducing agent. This method does not produce a trans isomer in parallel and is advantageous.