Repetitive activites, dissimilar to its background rhythm, from one region are the well-known ictal EEG pattems of the partial seizure. It is, however, very difficult to obtain ictal scalp EEG of the partial seizure. So there have been only a few studies about this. Authors analyzed ictal scalp EEGs of 25 patients to get the useful diagnostic aids in localizing and confirming the foci of the partial seizure. The causes of parhal seizure were diverse. But idiopathic seizure was most common (10 patients, 40%). 19(76%) patients showed clinical seizure. But there was no clinical seizure in 6 (24%) patients. There are a lot of ictal transformations. Initiation with rhythmic theta activity was the most-common finding: initiation with rhythmic theta activity was 7(28%), alpha-activity was 4 (16%), beta activity was 1 (4%), mixed waves was 5 (20%), and repetitive epileptiforrn potentials (REPs) was 5 (20%). These ictal scalp EEG patterns of the partial seizure, even though it is not conclusive yet, can be used as a very helpful diagnostic measure in detection of the foci and diagnosis of the partial seizure.