[en] A quadrupole magnet with use of permanent magnets (Al Ni Co Metal) is fabricated in order to study the feasibility as focusing elements in drift tubes of Alvarez linac. After a test of reproducibility of remanent field by application of various external magnetizations, a quadrupole magnet has been made, whose bore radius, core length and outer diameter of the yoke are 15 mm, 70 mm and 155 mm, respectively. In order to attain good field property, a pole tip of iron with circular shape is attached to each permanent magnet. Coils of 14 turns per pole which can accept up to 1000A pulse excitation are wound so as to make the field gradient to be variable. From field measurements, it is found that higher multipole components are negligibly small in the range of 50 -- 100 % of maximum excitation. Maximum field gradient of 2 KG/cm is obtained. (author)