It has been hypothesized that deficits of task performance under the test anxiety situation are caused by the occupation of anxiety-relevant information for resources of working memory system concerning information processing of the task. The purpose of this study was to examine the effect of memory loads with words on task performance. Fourteen high anxious and 15 low anxious undergraduates selected by the Reaction To Test (RTT) scale served as subjects. Subjects performed a grammatical reasoning task and a word recognition task simultaneously. The word recognition task was used as the memory load, which was controlled by the number of presented words. High test anxious subjects reported to feel more anxiety, such as worry and cognitive self-concern, during task performance than low anxious subjects did. High test anxious subjects showed deficits of task performance in both grammatical reasoning task and word recognition task, but low test anxious subjects showed deficits only in the grammatical reasoning task. As the result, increments of worry and cognitive self-concern led to performance decrements in the word recognition task for both groups of subjects. This finding might suggest that the occupation of anxiety-relevant information for the resource of working memory system interferes with the processing of task-relevant information.