The present invention provides a new bis(tetrahydrofuran) compound having an excellent neurotrophic factor activity-enhancing effect, and a process for producing the same. The bis(tetrahydrofuran) compound of the present invention is represented by formula (1): wherein R 1 and R 2 are the same or different, and represent a C 1-4 alkyl group, a C 1-5 alkoxy group, an aryl C 1-5 alkoxy group, a C 2-5 alkenyloxy group, or an aryl C 2-5 alkenyloxy group, or R 1 and R 2 together represent =O or =CH 2 ； R 3 represents a hydrogen atom or a group -CH 2 -O-R 4 ； R 4 represents a C 1-4 alkyl group, a C 1-5 alkylcarbonyl group, or an aryl C 1-4 alkyl group that may have a substituent on an aryl ring； and a carbon-carbon bond between "a" and "b" represents a single bond or a double bond. The bis(tetrahydrofuran) compound has an excellent neurotrophic factor activity-enhancing effect.
