The author describes a special form of resistance which occurs in the analysis of a person whose spouse reacts with anxiety to the changes effected in the analysand. The relationship between the analysand and spouse in such cases is an object relationship of mutually adaptive character in which the needs of each partner for the other are equal. When a shift occurs in the equilibrium of such an emotionally meaningful relationship, the partner not in treatment reacts to it as a threat and this is reflected in the patient who evidences resistance to further resolution of unconscious conflicts. The resistance is related to the disturbed marital equilibrium which places the marriage in jeopardy. The mates of such analysands, though initially supportive and encouraging, react with various devices designed to sabotage the analysis. Hence, in many cases in order to analyze a married person successfully, the spouse also has to be analyzed.