Patent ID: 7638025

Claim:
A fluid handling apparatus comprising: a first flow passage capable of moving a first fluid due to capillarity; a second flow passage capable of moving a second fluid due to capillarity; and a connecting portion for allowing said first flow passage, said second flow passage and an external environment to be communicated with each other, said connecting portion comprising: a third flow passage for allowing said first flow passage to be communicated with said external environment, said third flow passage being formed so as to be capable of moving said first fluid due to capillarity; a fourth flow passage for allowing said second flow passage to be communicated with said external environment, said fourth flow passage being formed so as to be capable of moving said second fluid due to capillarity; and a fifth flow passage for allowing said first flow passage to be communicated with said second flow passage, said fifth flow passage having a smaller flow passage area than that of each of said first and second flow passages, and said fifth flow passage being formed so as to be capable of moving said first fluid or said second fluid due to capillarity, wherein an interface between said first fluid, which moves in said first flow passage toward said connecting portion, and said second fluid, which moves in said second flow passage toward said connecting portion, is formed in said connecting portion.